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Ortega-Ramos PA, Mauchline AL, Metcalfe H, Cook SM, Girling RD, Collins L. Modelling the factors affecting the spatiotemporal distribution of cabbage stem flea beetle (Psylliodes chrysocephala) larvae in winter oilseed rape (Brassica napus) in the UK. Pest Manag Sci 2024; 80:2267-2281. [PMID: 36827249 DOI: 10.1002/ps.7427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/30/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Cabbage stem flea beetle (CSFB; Psylliodes chrysocephala L.) management in oilseed rape (Brassica napus L.) has become an urgent issue in the absence of permitted and effective insecticides. Understanding the meteorological and management factors affecting their population dynamics has become critical to the development of pest management strategies. RESULTS The spatio-temporal changes in CSFB larval populations were assessed both in autumn and spring, in the UK from 2003 to 2017 (a period encompassing pre-and post-neonicotinoid insecticide restriction). After the neonicotinoid ban in 2013, the number of larvae both in autumn and spring increased 10-fold in the UK. When neonicotinoids were available, later sown crops contained fewer larvae than early sown crops, and bigger fields had fewer larvae than smaller fields, whereas after the ban, bigger fields tended to have more larvae than smaller fields. Wet and mild/hot Septembers were related with higher numbers of larvae when neonicotinoids were available and with lower larval numbers after the neonicotinoid ban. Low temperatures in December and January combined with high rainfall were related with high numbers of larvae in spring both before and after the neonicotinoid ban. CONCLUSION This study will help to produce decision support systems that allow future predictions of regional CSFB population changes and will help growers and consultants to adjust their management methods to reduce the risk of high infestations. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | - Alice L Mauchline
- School of Agriculture Policy and Development, University of Reading, Berkshire, UK
| | - Helen Metcalfe
- Protecting Crops and Environment, Rothamsted Research, Harpenden, UK
| | - Samantha M Cook
- Protecting Crops and Environment, Rothamsted Research, Harpenden, UK
| | - Robbie D Girling
- School of Agriculture Policy and Development, University of Reading, Berkshire, UK
| | - Larissa Collins
- Fera Science Ltd, National Agri-Food Innovation Campus, York, UK
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Zhang N, Hu W, Wu K, Wang K, Miao X, Wang Y, Zhong X, Lin F, Zhang Z, Xu H. The Amino Acid Transporter PtCAT7 and Ammonium Nutrition Enhance the Uptake of Thiamethoxam in Citrus Rootstock Seedlings. J Agric Food Chem 2024; 72:6942-6953. [PMID: 38506763 DOI: 10.1021/acs.jafc.3c09489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Thiamethoxam (THX), when applied to the soil, can be taken up by citrus roots and subsequently transported to the leaves, providing effective protection of plants against the Asian citrus psyllid (Diaphorina citri Kuwayama). In this study, the field experiments showed that the coapplication of THX and nitrogen fertilizer (AN) did not affect THX uptake in six-year-old citrus plants. However, their coapplication promoted THX uptake in three-year-old Potassium trifoliate rootstocks and relieved the inhibition of AN at a higher level on plant growth characteristics, including biomass and growth of root and stem. RNA-seq analysis found that THX induced upregulation of a cationic amino acid transporter (PtCAT7) in citrus leaves. PtCAT7 facilitated THX uptake in the yeast strain to inhibit its growth, and the PtCAT7 protein was localized on the plasma membrane. Our results demonstrate that THX and N fertilizer can be coapplied and PtCAT7 may be involved in THX uptake in citrus.
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Affiliation(s)
- Ning Zhang
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou 510642, China
- National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Wei Hu
- National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Keer Wu
- National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Kejing Wang
- National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Xiaoran Miao
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou 510642, China
| | - Yongqing Wang
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou 510642, China
| | - Xiaoyue Zhong
- National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou 341000, China
| | - Fei Lin
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou 510642, China
| | - Zhixiang Zhang
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou 510642, China
| | - Hanhong Xu
- National Key Laboratory of Green Pesticide, South China Agricultural University, Guangzhou 510642, China
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Abd El-Lateef HM, Khalaf MM, Gouda M, Gad MA, Abdelhamid AA, Ismail AF, Amer AA, Drar AM. Synthesis and Insecticidal Evaluation of 3,5-Dicyanopyridines Against Cotton Aphids via Microwave-Assisted Multicomponent Reactions. Chem Biodivers 2024; 21:e202400218. [PMID: 38381590 DOI: 10.1002/cbdv.202400218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/21/2024] [Accepted: 02/21/2024] [Indexed: 02/23/2024]
Abstract
Certain 2-amino-6-alkoxy-4-arylpyridine-3,5-dicyanide 1a-e were prepared via a straightforward process using microwave technology rather than conventional methods. This involved reaction of arylidenemalononitrile thru propanedinitrile in the occurrence of sodium alkoxide under MW. While, their positional isomer 4-amino-6-alkoxy-2-arylpyridine-3,5-dicyanide 3a-j have been separated from the reaction of aryl aldehydes with 2-aminoprop-1-ene-1,1,3-tricarbonitrile 2 in the presence of sodium alkoxide using microwave technic. Furthermore, the insecticidal properties of all synthesized compounds were observed with respect to Cotton aphid nymphs and adults. Neonicotinoid pesticides are indicated as the most effective pesticides toward aphids and many other pests. Many insecticides are discovered as novelties. As a result, several pyridine compounds were chemical method synthesized to serve as equivalents of neonicotinoids, a broad class of insecticides. With LC50 value of 0.03 mg/L, components 3g exhibit the highest insecticidal bioactivity. This work discusses how to find new chemicals that could be used as insecticidal agents in the future.
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Affiliation(s)
- Hany M Abd El-Lateef
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Mai M Khalaf
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Mohamed Gouda
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Saudi Arabia
| | - Mohamed A Gad
- Research Institute of Plant Protection, Agriculture Research Center, Giza, 12619, Egypt
| | - Antar A Abdelhamid
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt
- Chemistry Department, Faculty of Science, Al-Baha University, Al-Baha, 1988, Saudi Arabia
| | - Abdelrahim Fathy Ismail
- The Scientific Journal of King Faisal University, King Faisal University, Al Ahsa, Saudi Arabia
- Department of Curriculum and Instruction, Faculty of Education, Assiut University, Assiut, Egypt
| | - Amer A Amer
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Ali M Drar
- Research Institute of Plant Protection, Agriculture Research Center, Giza, 12619, Egypt
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Zhang K, Chen L, Chen J, Huang H, Liu K, Zhang Y, Yang J, Wu S. Mutation V65I in the β1 Subunit of the Nicotinic Acetylcholine Receptor Confers Neonicotinoid and Sulfoxaflor Resistance in Insects. J Agric Food Chem 2024; 72:5671-5681. [PMID: 38442746 DOI: 10.1021/acs.jafc.3c09456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Neonicotinoids have been widely used to control pests with remarkable effectiveness. Excessive insecticides have led to serious insect resistance. Mutations of the nicotinic acetylcholine receptor (nAChR) are one of the reasons for neonicotinoid resistance conferred in various agricultural pests. Two mutations, V65I and V104I, were found in the nAChR β1 subunit of two neonicotinoid-resistant aphid populations. However, the specific functions of the two mutations remain unclear. In this study, we cloned and identified four nAChR subunits (α1, α2, α8, and β1) of thrips and found them to be highly homologous to the nAChR subunits of other insects. Subsequently, we successfully expressed two subtypes nAChR (α1/α2/α8/β1 and α1/α8/β1) by coinjecting three cofactors for the first time in thrips, and α1/α8/β1 showed abundant current rapidly. Acetylcholine, neonicotinoids, and sulfoxaflor exhibited different activation capacities for the two subtypes of nAChRs. Finally, V65I was found to significantly reduce the binding ability of nAChR to neonicotinoids and sulfoxaflor through electrophysiology and computer simulations. V104I caused a decrease in agonist affinity (pEC50) but an increase in the efficacy (Imax) of nAChR against neonicotinoids and reduced the binding ability of nAChR to sulfoxaflor. This study provides theoretical and technical support for studying the molecular mechanisms of neonicotinoid resistance in pests.
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Affiliation(s)
- Kun Zhang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
| | - Longwei Chen
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
| | - Jianwen Chen
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
| | - Huixiu Huang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
| | - Kaiyang Liu
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
| | - Yi Zhang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
| | - Jingfang Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- National Nanfan Research Institute, Chinese Academy of Agricultural Sciences, Sanya 572024, China
| | - Shaoying Wu
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572024, China
- School of Tropical Agriculture and Forestry (School of Agricultural and Rural Affairs, School of Rural Revitalization), Hainan University, Danzhou 571700, China
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Ashu FA, Fouet C, Ambadiang MM, Penlap-Beng V, Kamdem C. Adult mosquitoes of the sibling species Anopheles gambiae and Anopheles coluzzii exhibit contrasting patterns of susceptibility to four neonicotinoid insecticides along an urban-to-rural gradient in Yaoundé, Cameroon. Malar J 2024; 23:65. [PMID: 38431623 PMCID: PMC10909279 DOI: 10.1186/s12936-024-04876-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 02/10/2024] [Indexed: 03/05/2024] Open
Abstract
BACKGROUND Neonicotinoids are potential alternatives for controlling pyrethroid-resistant mosquitoes, but their efficacy against malaria vector populations of sub-Saharan Africa has yet to be investigated. The aim of the present study was to test the efficacy of four neonicotinoids against adult populations of the sibling species Anopheles gambiae and Anopheles coluzzii sampled along an urban-to-rural gradient. METHODS The lethal toxicity of three active ingredients for adults of two susceptible Anopheles strains was assessed using concentration-response assays, and their discriminating concentrations were calculated. The discriminating concentrations were then used to test the susceptibility of An. gambiae and An. coluzzii mosquitoes collected from urban, suburban and rural areas of Yaoundé, Cameroon, to acetamiprid, imidacloprid, clothianidin and thiamethoxam. RESULTS Lethal concentrations of neonicotinoids were relatively high suggesting that this class of insecticides has low toxicity against Anopheles mosquitoes. Reduced susceptibility to the four neonicotinoids tested was detected in An. gambiae populations collected from rural and suburban areas. By contrast, adults of An. coluzzii that occurred in urbanized settings were susceptible to neonicotinoids except acetamiprid for which 80% mortality was obtained within 72 h of insecticide exposure. The cytochrome inhibitor, piperonyl butoxide (PBO), significantly enhanced the activity of clothianidin and acetamiprid against An. gambiae mosquitoes. CONCLUSIONS These findings corroborate susceptibility profiles observed in larvae and highlight a significant variation in tolerance to neonicotinoids between An. gambiae and An. coluzzii populations from Yaoundé. Further studies are needed to disentangle the role of exposure to agricultural pesticides and of cross-resistance mechanisms in the development of neonicotinoid resistance in some Anopheles species.
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Affiliation(s)
- Fred A Ashu
- Centre for Research in Infectious Diseases, P.O. Box 13591, Yaoundé 9, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 11 812, Yaoundé, Cameroon
| | - Caroline Fouet
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave., El Paso, TX, 79968, USA
| | - Marilene M Ambadiang
- Centre for Research in Infectious Diseases, P.O. Box 13591, Yaoundé 9, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 11 812, Yaoundé, Cameroon
| | - Véronique Penlap-Beng
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 11 812, Yaoundé, Cameroon
| | - Colince Kamdem
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave., El Paso, TX, 79968, USA.
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Ambadiang M, Fouet C, Ashu F, Bouaka C, Penlap-Beng V, Kamdem C. Anopheles gambiae larvae's ability to grow and emerge in water containing lethal concentrations of clothianidin, acetamiprid, or imidacloprid is consistent with cross-resistance to neonicotinoids. Parasit Vectors 2024; 17:98. [PMID: 38429846 PMCID: PMC10905935 DOI: 10.1186/s13071-024-06188-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 02/08/2024] [Indexed: 03/03/2024] Open
Abstract
BACKGROUND For decades, various agrochemicals have been successfully repurposed for mosquito control. However, preexisting resistance caused in larval and adult populations by unintentional pesticide exposure or other cross-resistance mechanisms poses a challenge to the efficacy of this strategy. A better understanding of larval adaptation to the lethal and sublethal effects of residual pesticides in aquatic habitats would provide vital information for assessing the efficacy of repurposed agrochemicals against mosquitoes. METHODS We reared field-collected mosquito larvae in water containing a concentration of agrochemical causing 100% mortality in susceptible mosquitoes after 24 h (lethal concentration). Using this experimental setup, we tested the effect of lethal concentrations of a pyrrole (chlorfenapyr, 0.10 mg/l), a pyrethroid (deltamethrin, 1.5 mg/l), and three neonicotinoids including imidacloprid (0.075 mg/l), acetamiprid (0.15 mg/l), and clothianidin (0.035 mg/l) on mortality rates, growth, and survival in third-instar larvae of the two sibling species Anopheles gambiae and Anopheles coluzzii collected from Yaoundé, Cameroon. RESULTS We found that An. gambiae and An. coluzzii larvae were susceptible to chlorfenapyr and were killed within 24 h by a nominal concentration of 0.10 mg/l. Consistent with strong resistance, deltamethrin induced low mortality in both species. Lethal concentrations of acetamiprid, imidacloprid, and clothianidin strongly inhibited survival, growth, and emergence in An. coluzzii larvae. By contrast, depending on the active ingredient and the population tested, 5-60% of immature stages of An. gambiae were able to grow and emerge in water containing a lethal concentration of neonicotinoids, suggesting cross-resistance to this class of insecticides. CONCLUSIONS These findings corroborate susceptibility profiles observed in adults and suggest that unintentional pesticide exposure or other cross-resistance processes could contribute to the development of resistance to neonicotinoids in some Anopheles populations.
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Affiliation(s)
- Marilene Ambadiang
- Centre for Research in Infectious Diseases (CRID), Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
| | - Caroline Fouet
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, USA
| | - Fred Ashu
- Centre for Research in Infectious Diseases (CRID), Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
| | - Calmes Bouaka
- Centre for Research in Infectious Diseases (CRID), Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
| | - Véronique Penlap-Beng
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
| | - Colince Kamdem
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX, USA.
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Cecala JM, Vannette RL. Nontarget impacts of neonicotinoids on nectar-inhabiting microbes. Environ Microbiol 2024; 26:e16603. [PMID: 38494634 DOI: 10.1111/1462-2920.16603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 02/23/2024] [Indexed: 03/19/2024]
Abstract
Plant-systemic neonicotinoid (NN) insecticides can exert non-target impacts on organisms like beneficial insects and soil microbes. NNs can affect plant microbiomes, but we know little about their effects on microbial communities that mediate plant-insect interactions, including nectar-inhabiting microbes (NIMs). Here we employed two approaches to assess the impacts of NN exposure on several NIM taxa. First, we assayed the in vitro effects of six NN compounds on NIM growth using plate assays. Second, we inoculated a standardised NIM community into the nectar of NN-treated canola (Brassica napus) and assessed microbial survival and growth after 24 h. With few exceptions, in vitro NN exposure tended to decrease bacterial growth metrics. However, the magnitude of the decrease and the NN concentrations at which effects were observed varied substantially across bacteria. Yeasts showed no consistent in vitro response to NNs. In nectar, we saw no effects of NN treatment on NIM community metrics. Rather, NIM abundance and diversity responded to inherent plant qualities like nectar volume. In conclusion, we found no evidence that NIMs respond to field-relevant NN levels in nectar within 24 h, but our study suggests that context, specifically assay methods, time and plant traits, is important in assaying the effects of NNs on microbial communities.
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Affiliation(s)
- Jacob M Cecala
- Department of Entomology & Nematology, University of California, Davis, California, USA
| | - Rachel L Vannette
- Department of Entomology & Nematology, University of California, Davis, California, USA
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Yin C, O’Reilly AO, Liu SN, Du TH, Gong PP, Zhang CJ, Wei XG, Yang J, Huang MJ, Fu BL, Liang JJ, Xue H, Hu JY, Ji Y, He C, Du H, Wang C, Zhang R, Tan QM, Lu HT, Xie W, Chu D, Zhou XG, Nauen R, Gui LY, Bass C, Yang X, Zhang YJ. Dual mutations in the whitefly nicotinic acetylcholine receptor β1 subunit confer target-site resistance to multiple neonicotinoid insecticides. PLoS Genet 2024; 20:e1011163. [PMID: 38377137 PMCID: PMC10906874 DOI: 10.1371/journal.pgen.1011163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 03/01/2024] [Accepted: 01/30/2024] [Indexed: 02/22/2024] Open
Abstract
Neonicotinoid insecticides, which target insect nicotinic acetylcholine receptors (nAChRs), have been widely and intensively used to control the whitefly, Bemisia tabaci, a highly damaging, globally distributed, crop pest. This has inevitably led to the emergence of populations with resistance to neonicotinoids. However, to date, there have been no reports of target-site resistance involving mutation of B. tabaci nAChR genes. Here we characterize the nAChR subunit gene family of B. tabaci and identify dual mutations (A58T&R79E) in one of these genes (BTβ1) that confer resistance to multiple neonicotinoids. Transgenic D. melanogaster, where the native nAChR Dβ1 was replaced with BTβ1A58T&R79E, were significantly more resistant to neonicotinoids than flies where Dβ1 were replaced with the wildtype BTβ1 sequence, demonstrating the causal role of the mutations in resistance. The two mutations identified in this study replace two amino acids that are highly conserved in >200 insect species. Three-dimensional modelling suggests a molecular mechanism for this resistance, whereby A58T forms a hydrogen bond with the R79E side chain, which positions its negatively-charged carboxylate group to electrostatically repulse a neonicotinoid at the orthosteric site. Together these findings describe the first case of target-site resistance to neonicotinoids in B. tabaci and provide insight into the molecular determinants of neonicotinoid binding and selectivity.
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Affiliation(s)
- Cheng Yin
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, Hubei, P. R. China
| | - Andrias O. O’Reilly
- School of Biological & Environmental Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Shao-Nan Liu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Tian-Hua Du
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Pei-Pan Gong
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Cheng-Jia Zhang
- Hunan Provincial Key laboratory of Pesticide Biology and Precise Use Techology, Hunan Agricultural Biotechnology Research Institute, Changsha, P. R. China
| | - Xue-Gao Wei
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Jing Yang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Ming-Jiao Huang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Bu-Li Fu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Jin-Jin Liang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Hu Xue
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Jin-Yu Hu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Yao Ji
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Chao He
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - He Du
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Chao Wang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Rong Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Qi-Mei Tan
- Hunan Provincial Key laboratory of Pesticide Biology and Precise Use Techology, Hunan Agricultural Biotechnology Research Institute, Changsha, P. R. China
| | - Han-Tang Lu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Wen Xie
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Dong Chu
- Key Laboratory of Integrated Crop Pest Management of Shandong Province, School of Agriculture and Plant Protection, Qingdao Agricultural University, Qingdao, Shandong Province, China
| | - Xu-Guo Zhou
- Department of Entomology, University of Kentucky, Lexington, Kentucky, United States of America
| | - Ralf Nauen
- Bayer AG, Crop Science Division, R&D, Monheim, Germany
| | - Lian-You Gui
- Hubei Engineering Technology Center for Pest Forewarning and Management, College of Agriculture, Yangtze University, Jingzhou, Hubei, P. R. China
| | - Chris Bass
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall, United Kingdom
| | - Xin Yang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - You-Jun Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
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Hu J, Fu B, Liang J, Zhang R, Wei X, Yang J, Tan Q, Xue H, Gong P, Liu S, Huang M, Du T, Yin C, He C, Ji Y, Wang C, Zhang C, Du H, Su Q, Yang X, Zhang Y. CYP4CS5-mediated thiamethoxam and clothianidin resistance is accompanied by fitness cost in the whitefly Bemisia tabaci. Pest Manag Sci 2024; 80:910-921. [PMID: 37822143 DOI: 10.1002/ps.7826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/25/2023] [Accepted: 10/12/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND Understanding the trade-offs between insecticide resistance and the associated fitness is of particular importance to sustainable pest control. One of the most devastating pest worldwide, the whitefly Bemisia tabaci, has developed resistance to various insecticides, especially the neonicotinoid group. Although neonicotinoid resistance often is conferred by P450s-mediated metabolic resistance, the relationship between such resistance and the associated fitness phenotype remains largely elusive. By gene cloning, quantitative reverse transcription (qRT)-PCR, RNA interference (RNAi), transgenic Drosophila melanogaster, metabolism capacity in vitro and 'two sex-age stage' life table study, this study aims to explore the molecular role of a P450 gene CYP4CS5 in neonicotinoid resistance and to investigate whether such resistance mechanism carries fitness costs in the whitefly. RESULTS Our bioassay tests showed that a total of 13 field-collected populations of B. tabaci MED biotype displayed low-to-moderate resistance to thiamethoxam and clothianidin. Compared to the laboratory susceptible strain, we then found that an important P450 CYP4CS5 was remarkably upregulated in the field resistant populations. Such overexpression of CYP4CS5 had a good match with the resistance level among the whitefly samples. Further exposure to the two neonicotinoids resulted in an increase in CYP4CS5 expression. These results implicate that overexpression of CYP4CS5 is closely correlated with thiamethoxam and clothianidin resistance. RNAi knockdown of CYP4CS5 increased mortality of the resistant and susceptible populations after treatment with thiamethoxam and clothianidin in bioassay, but obtained an opposite result when using a transgenic line of D. melanogaster expressing CYP4CS5. Metabolic assays in vitro revealed that CYP4CS5 exhibited certain capacity of metabolizing thiamethoxam and clothianidin. These in vivo and in vitro assays indicate an essential role of CYP4CS5 in conferring thiamethoxam and clothianidin resistance in whitefly. Additionally, our life-table analysis demonstrate that the field resistant whitefly exhibited a prolonged development time, shortened longevity and reduced fecundity compared to the susceptible, suggesting an existing fitness cost as a result of the resistance. CONCLUSION Collectively, in addition to the important role of CYP4CS5 in conferring thiamethoxam and clothianidin resistance, this resistance mechanism is associated with fitness costs in the whitefly. These findings not only contribute to the development of neonicotinoids resistance management strategies, but also provide a new target for sustainable whitefly control. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Jinyu Hu
- Ministry of Agriculture and Rural Affairs Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-construction by Ministry and Province), Hubei Engineering Technology Center for Forewarning and Management of Agricultural and Forestry Pests, College of Agriculture, Yangtze University, Jingzhou, China
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Buli Fu
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
- The Ministry of Agriculture and Rural Affairs Key Laboratory of Integrated Pest Management of Tropical Crops, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Jinjin Liang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Rong Zhang
- Ministry of Agriculture and Rural Affairs Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-construction by Ministry and Province), Hubei Engineering Technology Center for Forewarning and Management of Agricultural and Forestry Pests, College of Agriculture, Yangtze University, Jingzhou, China
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xuegao Wei
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jing Yang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qimei Tan
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hu Xue
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Peipan Gong
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shaonan Liu
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Mingjiao Huang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Tianhua Du
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Cheng Yin
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chao He
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yao Ji
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chao Wang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chengjia Zhang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - He Du
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qi Su
- Ministry of Agriculture and Rural Affairs Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-construction by Ministry and Province), Hubei Engineering Technology Center for Forewarning and Management of Agricultural and Forestry Pests, College of Agriculture, Yangtze University, Jingzhou, China
| | - Xin Yang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Youjun Zhang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
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Ligonniere S, Raymond V, Goven D. Use of double-stranded RNA targeting β2 divergent nicotinic acetylcholine receptor subunit to control pea aphid Acyrthosiphon pisum at larval and adult stages. Pest Manag Sci 2024; 80:896-904. [PMID: 37816139 DOI: 10.1002/ps.7820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/20/2023] [Accepted: 10/08/2023] [Indexed: 10/12/2023]
Abstract
BACKGROUND In recent years, the use of the RNA interference technology (RNAi) has emerged as one of the new strategies for species-specific control of insect pests. Its specificity depends on the distinctiveness of the target gene sequence for a given species. In this work, we assessed in the pea aphid Acyrthosiphon pisum (A. pisum) the use of a double-stranded RNA (dsRNA) that targets the β2 divergent nicotinic acetylcholine receptor (nAChR) subunit (dsRNA-β2), which shares low sequence identity with other subunits, to control populations of this pest at different developmental stages. Because nAChRs are targeted by neonicotinoid insecticides such as imidacloprid, we also assessed the effect of dsRNA-β2 coupled to this insecticide on aphid survival. Finally, because the effect of a control agent on beneficial insect must be considered before any use of new pest management strategies, the acute toxicity of dsRNA-β2 combined with imidacloprid was evaluated on honeybee Apis mellifera. RESULTS In this work, we demonstrated that dsRNA-β2 alone has an insecticidal effect on aphid larvae and adults. Moreover, dsRNA-β2 and imidacloprid effects on aphid larvae and adults were additive, meaning that dsRNA-β2 did not alter the efficacy of imidacloprid on these two developmental stages. Also, no obvious acute toxicity on Apis mellifera was reported. CONCLUSION Using RNAi that targets β2 divergent nAChR subunit is effective alone or combined with imidacloprid to control A. pisum at larval and adult stages. Because no obvious Apis mellifera mortality has been reported, this RNAi-based pest management strategy should be considered to control insect pest. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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11
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Tan D, Xu X, Li Z, Xu Z, Shao X. Design, Synthesis, and Synergistic Activities of Eight-Membered Carbon Bridged Neonicotinoid Derivatives. Chem Biodivers 2024; 21:e202301412. [PMID: 38147354 DOI: 10.1002/cbdv.202301412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/26/2023] [Accepted: 12/25/2023] [Indexed: 12/27/2023]
Abstract
Insecticide synergists are an effective approach to increase the control efficacy and reduce active ingredient usage. In order to explore neonicotinoid-specific synergists with novel scaffolds and higher potency, a series of eight-membered carbon bridged neonicotinoid derivatives were designed and synthesized in accordance with our previous research. The synergistic effects of the target compounds on neonicotinoids in Aphis craccivora were evaluated, and the structure-activity relationships were summarized. The results indicated that most of the target compounds exhibited significant synergistic effects on imidacloprid in A. craccivora at low concentrations. In particular, compound 1 at a concentration of 1 mg/L reduced the LC50 value of imidacloprid from 0.856 mg/L to 0.170 mg/L. Meanwhile, compound 1 also increased the insecticidal activity of most neonicotinoid insecticides belonging to the Insecticide Resistance Action Committee (IRAC) 4 A subgroup against A. craccivora. The present study might be meaningful for directing the design of neonicotinoid-specific synergists.
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Affiliation(s)
- Du Tan
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Xiaoyong Xu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhong Li
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhiping Xu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
| | - Xusheng Shao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, 200237, China
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12
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Fouet C, Ashu FA, Ambadiang MM, Tchapga W, Wondji CS, Kamdem C. Clothianidin-resistant Anopheles gambiae adult mosquitoes from Yaoundé, Cameroon, display reduced susceptibility to SumiShield® 50WG, a neonicotinoid formulation for indoor residual spraying. BMC Infect Dis 2024; 24:133. [PMID: 38273227 PMCID: PMC10811947 DOI: 10.1186/s12879-024-09030-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
BACKGROUND Chronic exposure of mosquito larvae to pesticide residues and cross-resistance mechanisms are major drivers of tolerance to insecticides used for vector control. This presents a concern for the efficacy of clothianidin, an agricultural neonicotinoid prequalified for Indoor Residual Spraying (IRS). METHODS Using standard bioassays, we tested if reduced susceptibility to clothianidin can affect the efficacy of SumiShield® 50WG, one of four new IRS formulations containing clothianidin. We simultaneously monitored susceptibility to clothianidin and to SumiShield 50WG, testing adults of Anopheles gambiae, An. coluzzii and Culex sp sampled from urban, suburban and agricultural areas of Yaoundé, Cameroon. RESULTS We found that in this geographic area, the level of susceptibility to the active ingredient predicted the efficacy of SumiShield 50WG. This formulation was very potent against populations that reached 100% mortality within 72 h of exposure to a discriminating concentration of clothianidin. By contrast, mortality leveled off at 75.4 ± 3.5% within 7 days of exposure to SumiShield 50WG in An. gambiae adults collected from a farm where the spraying of the two neonicotinoids acetamiprid and imidacloprid for crop protection is likely driving resistance to clothianidin. CONCLUSIONS Despite the relatively small geographic extend of the study, the findings suggest that cross-resistance may impact the efficacy of some new IRS formulations and that alternative compounds could be prioritized in areas where neonicotinoid resistance is emerging.
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Affiliation(s)
- Caroline Fouet
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA
| | - Fred A Ashu
- Centre for Research in Infectious Diseases (CRID), P.O. Box 13591, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon
| | - Marilene M Ambadiang
- Centre for Research in Infectious Diseases (CRID), P.O. Box 13591, Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon
| | - Williams Tchapga
- Centre for Research in Infectious Diseases (CRID), P.O. Box 13591, Yaoundé, Cameroon
| | - Charles S Wondji
- Centre for Research in Infectious Diseases (CRID), P.O. Box 13591, Yaoundé, Cameroon
- Vector Biology Department, Liverpool School of Tropical Medicine (LSTM), Pembroke Place, Liverpool, L3 5QA, UK
| | - Colince Kamdem
- Department of Biological Sciences, The University of Texas at El Paso, 500 W. University Ave, El Paso, TX, 79968, USA.
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Pym A, Troczka BJ, Hayward A, Zeng B, Gao CF, Elias J, Slater R, Zimmer CT, Bass C. The role of the Bemisia tabaci and Trialeurodes vaporariorum cytochrome-P450 clade CYP6DPx in resistance to nicotine and neonicotinoids. Pestic Biochem Physiol 2024; 198:105743. [PMID: 38225086 DOI: 10.1016/j.pestbp.2023.105743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/07/2023] [Accepted: 12/09/2023] [Indexed: 01/17/2024]
Abstract
The alkaloid, nicotine, produced by tobacco and other Solanaceae as an anti-herbivore defence chemical is one of the most toxic natural insecticides in nature. However, some insects, such as the whitefly species, Trialeurodes vaporariorum and Bemisia tabaci show strong tolerance to this allelochemical and can utilise tobacco as a host. Here, we used biological, molecular and functional approaches to investigate the role of cytochrome P450 enzymes in nicotine tolerance in T. vaporariorum and B. tabaci. Insecticide bioassays revealed that feeding on tobacco resulted in strong induced tolerance to nicotine in both species. Transcriptome profiling of both species reared on tobacco and bean hosts revealed profound differences in the transcriptional response these host plants. Interrogation of the expression of P450 genes in the host-adapted lines revealed that P450 genes belonging to the CYP6DP subfamily are strongly upregulated in lines reared on tobacco. Functional characterisation of these P450s revealed that CYP6DP1 and CYP6DP2 of T. vaporariorum and CYP6DP3 of B. tabaci confer resistance to nicotine in vivo. These three genes, in addition to the B. tabaci P450 CYP6DP5, were also found to confer resistance to the neonicotinoid imidacloprid. Our data provide new insight into the molecular basis of nicotine resistance in insects and illustrates how divergence in the evolution of P450 genes in this subfamily in whiteflies may have impacted the extent to which different species can tolerate a potent natural insecticide.
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Affiliation(s)
- Adam Pym
- College for Life and Environmental Sciences, University of Exeter, TR10 9FE Penryn, Cornwall, UK.
| | - Bartlomiej J Troczka
- College for Life and Environmental Sciences, University of Exeter, TR10 9FE Penryn, Cornwall, UK
| | - Angela Hayward
- College for Life and Environmental Sciences, University of Exeter, TR10 9FE Penryn, Cornwall, UK
| | - Bin Zeng
- College for Life and Environmental Sciences, University of Exeter, TR10 9FE Penryn, Cornwall, UK; College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Jiangsu, China
| | - Cong-Fen Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Jiangsu, China
| | - Jan Elias
- Syngenta Crop Protection AG, Rosentalstrasse 67, Basel CH4002, Switzerland
| | - Russell Slater
- Syngenta Crop Protection AG, Rosentalstrasse 67, Basel CH4002, Switzerland
| | - Christoph T Zimmer
- Syngenta Crop Protection AG, Werk Stein, Schaffhauserstrasse, Stein CH4332, Switzerland
| | - Chris Bass
- College for Life and Environmental Sciences, University of Exeter, TR10 9FE Penryn, Cornwall, UK
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Gong Y, Cheng S, Xiu X, Li F, Liu N, Hou M. Molecular Evolutionary Mechanisms of CYP6ER1vA-Type Variant Associated with Resistance to Neonicotinoid Insecticides in Field Populations of Nilaparvata lugens. J Agric Food Chem 2023; 71:19935-19948. [PMID: 38083901 DOI: 10.1021/acs.jafc.3c03167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The evolution of insecticide resistance has threatened the control of Nilaparvata lugens. Research on mechanisms behind neonicotinoid resistance in N. lugens remains incomplete. This study examined P450-mediated resistance to neonicotinoids in a resistant N. lugens strain (XA-2017-3G). The overexpression of CYP6ER1 in the XA-2017-3G strain plays a role in neonicotinoid resistance, as confirmed by RNA interference. Phenotypic analyses of CYP6ER1-mediated resistance in strains, including laboratory-susceptible, field-collected, and imidacloprid-laboratory further-selected strains, revealed that the vA-type/vL-type genotype exhibited greater resistance to neonicotinoids compared to the vA-type/vA-type genotype. The mRNA expression levels of CYP6ER1vA-type were closely correlated with the levels of neonicotinoid resistance in N. lugens strains, in which CYP6ER1vA-type overexpression is in part attributed to increased copy numbers of CYP6ER1. CYP6ER1vA-type-mediated neonicotinoid resistance was further confirmed by a CYP6ER1vA-type transgenic Drosophila melanogaster line. Taken together, our findings strongly suggest that the overexpression of CYP6ER1vA-type, which can be partially attributed to copy number variations, plays a crucial role in N. lugens resistance to neonicotinoids.
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Affiliation(s)
- Youhui Gong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Shiyang Cheng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Xiaojian Xiu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Fei Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Nannan Liu
- Department of Entomology and Plant Pathology, Auburn University, Auburn, Alabama 36849, United States
| | - Maolin Hou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
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Lira EC, Nascimento AR, Bass C, Omoto C, Cônsoli FL. Transcriptomic investigation of the molecular mechanisms underlying resistance to the neonicotinoid thiamethoxam and the pyrethroid lambda-cyhalothrin in Euschistus heros (Hemiptera: Pentatomidae). Pest Manag Sci 2023; 79:5349-5361. [PMID: 37624650 DOI: 10.1002/ps.7745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/18/2023] [Accepted: 08/25/2023] [Indexed: 08/27/2023]
Abstract
BACKGROUND Laboratory-selected resistant strains of Euschistus heros to thiamethoxam (NEO) and lambda-cyhalothrin (PYR) were recently reported in Brazil. However, the mechanisms conferring resistance to these insecticides in E. heros remain unresolved. We utilized comparative transcriptome profiling and single nucleotide polymorphism (SNP) calling of susceptible and resistant strains of E. heros to investigate the molecular mechanism(s) underlying resistance. RESULTS The E. heros transcriptome was assembled, generating 91 673 transcripts with a mean length of 720 bp and N50 of 1795 bp. Comparative gene expression analysis between the susceptible (SUS) and NEO strains identified 215 significantly differentially expressed (DE) transcripts. DE transcripts associated with the xenobiotic metabolism were all up-regulated in the NEO strain. The comparative analysis of the SUS and PYR strains identified 204 DE transcripts, including an esterase (esterase FE4), a glutathione-S-transferase, an ABC transporter (ABCC1) and aquaporins that were up-regulated in the PYR strain. We identified 9588 and 15 043 nonsynonymous SNPs in the PYR and NEO strains. One of the SNPs (D70N) detected in the NEO strain occurs in a subunit (α5) of the nAChRs, the target site of neonicotinoid insecticides. Nevertheless, this residue position in α5 is not conserved among insects. CONCLUSIONS Neonicotinoid and pyrethroid resistance in laboratory-selected E. heros is associated with a potential metabolic resistance mechanism by the overexpression of proteins commonly involved in the three phases of xenobiotic metabolism. Together these findings provide insight into the potential basis of resistance in E. heros and will inform the development and implementation of resistance management strategies against this important pest. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Ewerton C Lira
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture (Esalq), University of São Paulo (USP), Piracicaba, São Paulo, Brazil
| | - Antonio Rb Nascimento
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture (Esalq), University of São Paulo (USP), Piracicaba, São Paulo, Brazil
| | - Chris Bass
- Science and Engineering Research Support Facility (SERSF), University of Exeter, Cornwall, UK
| | - Celso Omoto
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture (Esalq), University of São Paulo (USP), Piracicaba, São Paulo, Brazil
| | - Fernando L Cônsoli
- Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture (Esalq), University of São Paulo (USP), Piracicaba, São Paulo, Brazil
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Ashu FA, Fouet C, Ambadiang MM, Penlap-Beng V, Kamdem C. Vegetable oil-based surfactants are adjuvants that enhance the efficacy of neonicotinoid insecticides and can bias susceptibility testing in adult mosquitoes. PLoS Negl Trop Dis 2023; 17:e0011737. [PMID: 37976311 PMCID: PMC10656025 DOI: 10.1371/journal.pntd.0011737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND The standard operating procedure for testing the susceptibility of adult mosquitoes to neonicotinoid or butenolide insecticides recommends using a vegetable oil ester (Mero) as a surfactant. However, there is growing evidence that this adjuvant contains surfactants that can enhance insecticide activity, mask resistance and bias the bioassay. METHODOLOGY/PRINCIPAL FINDINGS Using standard bioassays, we tested the effects of commercial formulations of vegetable oil-based surfactants similar to Mero on the activity of a spectrum of active ingredients including four neonicotinoids (acetamiprid, clothianidin, imidacloprid and thiamethoxam) and two pyrethroids (permethrin and deltamethrin). We found that three different brands of linseed oil soap used as cleaning products drastically enhanced neonicotinoid activity in Anopheles mosquitoes. At 1% (v/v), the surfactant reduced the median lethal concentration, LC50, of clothianidin more than 10-fold both in susceptible and in resistant populations of Anopheles gambiae. At 1% or 0.5% (v/v), linseed oil soap restored the susceptibility of adult mosquitoes fully to clothianidin, thiamethoxam and imidacloprid and partially to acetamiprid. By contrast, adding soap to the active ingredient did not significantly affect the level of resistance to permethrin or deltamethrin suggesting that vegetable oil-based surfactants specifically enhance the potency of some classes of insecticides. CONCLUSIONS/SIGNIFICANCE Our findings indicate that surfactants are not inert ingredients, and their use in susceptibility testing may jeopardize the ability to detect resistance. Further research is needed to evaluate the potential, the limitations and the challenges of using some surfactants as adjuvants to enhance the potency of some chemicals applied in mosquito control.
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Affiliation(s)
- Fred A. Ashu
- Centre for Research in Infectious Diseases (CRID), Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé, Yaoundé, Cameroon
| | - Caroline Fouet
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, Texas, United States of America
| | - Marilene M. Ambadiang
- Centre for Research in Infectious Diseases (CRID), Yaoundé, Cameroon
- Department of Biochemistry, Faculty of Science, University of Yaoundé, Yaoundé, Cameroon
| | - Véronique Penlap-Beng
- Department of Biochemistry, Faculty of Science, University of Yaoundé, Yaoundé, Cameroon
| | - Colince Kamdem
- Department of Biological Sciences, The University of Texas at El Paso, El Paso, Texas, United States of America
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17
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Du TH, Yin C, Gui LY, Liang JJ, Liu SN, Fu BL, He C, Yang J, Wei XG, Gong PP, Huang MJ, Xue H, Hu JY, Du H, Ji Y, Zhang R, Wang C, Zhang CJ, Yang X, Zhang YJ. Over-expression of UDP-glycosyltransferase UGT353G2 confers resistance to neonicotinoids in whitefly (Bemisia tabaci). Pestic Biochem Physiol 2023; 196:105635. [PMID: 37945266 DOI: 10.1016/j.pestbp.2023.105635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/28/2023] [Accepted: 09/30/2023] [Indexed: 11/12/2023]
Abstract
The whitefly, Bemisia tabaci, comes up high metabolic resistance to most neonicotinoids in long-term evolution, which is the key problem of pest control. UGT glycosyltransferase, as a secondary detoxification enzyme, plays an indispensable role in detoxification metabolism. In this study, UGT inhibitors, 5-nitrouracil and sulfinpyrazone, dramatically augmented the toxic damage of neonicotinoids to B. tabaci. A UGT named UGT353G2 was identified in whitefly, which was notably up-regulated in resistant strain (3.92 folds), and could be induced by most neonicotinoids. Additionally, the using of RNA interference (RNAi) suppresses UGT353G2 substantially increased sensitivity to neonicotinoids in resistant strain. Our results support that UGT353G2 may be involved in the neonicotinoids resistance of whitefly. These findings will help further verify the functional role of UGTs in neonicotinoid resistance.
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Affiliation(s)
- Tian-Hua Du
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Cheng Yin
- College of Agriculture, Yangtze University, Jingzhou, Hubei 434025, China
| | - Lian-You Gui
- College of Agriculture, Yangtze University, Jingzhou, Hubei 434025, China
| | - Jin-Jin Liang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shao-Nan Liu
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Bu-Li Fu
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chao He
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jing Yang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xue-Gao Wei
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Pei-Pan Gong
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ming-Jiao Huang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Hu Xue
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jin-Yu Hu
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - He Du
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yao Ji
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Rong Zhang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chao Wang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Cheng-Jia Zhang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xin Yang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - You-Jun Zhang
- State Key Laboratory of Vegetable Biobreeding, Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Yu C, Li J, Zhang Z, Zong M, Qin C, Mo Z, Sun D, Yang D, Zeng Q, Wang J, Ma K, Li J, Wan H, He S. Metal-Organic Framework-Based Insecticide and dsRNA Codelivery System for Insecticide Resistance Management. ACS Appl Mater Interfaces 2023; 15:48495-48505. [PMID: 37787656 DOI: 10.1021/acsami.3c09074] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Targeted silencing of resistance-associated genes by specific double-stranded RNA (dsRNA) is an attractive strategy for overcoming insecticide resistance in insect pests. However, silencing target genes of insect pests by feeding on dsRNA transported via plants remains challenging. Herein, a codelivery system of insecticide and dsRNA is designed by encapsulating imidacloprid and dsNlCYP6ER1 within zeolitic imidazolate framework-8 (ZIF-8) nanoparticles to improve the susceptibility of Nilaparvata lugens (Stål) to imidacloprid. With an average particle size of 195 nm and a positive surface charge, the derived imidacloprid/dsNlCYP6ER1@ZIF-8 demonstrates good monodispersity. Survival curve results showed that the survival rates of N. lugens treated with imidacloprid and imidacloprid@ZIF-8 were 82 and 62%, respectively, whereas, in the imidacloprid/dsNlCYP6ER1@ZIF-8 treatment group, the survival rate of N. lugens is only 8%. Pot experiments demonstrate that the survival rate in the imidacloprid/dsNlCYP6ER1@ZIF-8 treatment group was much lower than that in the imidacloprid treatment group, decreasing from 54 to 24%. The identification of NlCYP6ER1 expression and the fluorescence tracking of ZIF-8 demonstrate that ZIF-8 can codeliver dsRNA and insecticide to insects via rice. Safety evaluation results showed that the dsNlCYP6ER1@ZIF-8 nanoparticle had desirable biocompatibility and biosafety to silkworm. This dsRNA and insecticide codelivery system may be extended to additional insecticides with potential resistance problems in the future, greatly enhancing the development of pest resistance management.
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Affiliation(s)
- Chang Yu
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Jiaqing Li
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Zhaoyang Zhang
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Mao Zong
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Chuwei Qin
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Ziyao Mo
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Dan Sun
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Disi Yang
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Qinghong Zeng
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Jiayin Wang
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Kangsheng Ma
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Jianhong Li
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Hu Wan
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
| | - Shun He
- The Center of Crop Nanobiotechnology, College of Plant Science and Technology, Huazhong Agricultural University, No. 1 Shizishan Street, Wuhan 430074, China
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Ray A, Gadratagi BG, Budhlakoti N, Rana DK, Adak T, Govindharaj GPP, Patil NB, Mahendiran A, Rath PC. Functional response of an egg parasitoid, Trichogramma chilonis Ishii to sublethal imidacloprid exposure. Pest Manag Sci 2023; 79:3656-3665. [PMID: 37178406 DOI: 10.1002/ps.7540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/15/2023]
Abstract
BACKGROUND The effectiveness of a biological control agent depends on how well it can control pests and how compatible it is with pesticides. Therefore, we reported the multigenerational effect of a commonly used insecticide, imidacloprid, on the functional response of a widely acclaimed egg parasitoid, Trichogramma chilonis Ishii, to different densities of the host Corcyra cephalonica Stainton eggs. The study investigated the outcomes of the median lethal concentration (LC50 ) and sublethal concentrations (LC5 , LC30 ), along with control treatments for five continuous generations (F1 to F5 ). RESULTS The results showed that the F5 generation of LC30 , both of the F1 and F5 generations of LC50 , and the control all had a Type II functional response. A Type I functional response was exhibited for the F1 generation of LC30 and both generations of LC5 . The attack rate on host eggs treated with LC5 and LC30 did not change (decrease) with the shift in the type of functional response as compared to the control. A significant increase in the searching efficiency (a) was observed in the later generation (F5 ) under the exposure of LC5 and LC30 imidacloprid concentrations. A lower handling time (Th ) in both generations of the LC5 followed by LC30 treated individuals was observed when compared with the control and LC50 treatments. The per capita parasitization efficiency (1/Th ) and the rate of parasitization per handling time (a/Th ) were also considerably higher in both the generations of LC5 and LC30 than in the control and LC50 , thereby implying positive effects of imidacloprid on the parasitization potential of T. chilonis. CONCLUSION Altogether, these multigenerational outcomes on the functional response of T. chilonis could be leveraged to control the intractable lepidopteran pests under the mild exposure of imidacloprid in integrated pest management (IPM) programs as well as in the mass rearing of the parasitoid, T. chilonis. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Aishwarya Ray
- Department of Entomology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
- Crop Protection Division, ICAR - National Rice Research Institute, Cuttack, India
| | | | - Neeraj Budhlakoti
- Division of Agricultural Bioinformatics, ICAR - Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Dhanendra Kumar Rana
- Department of Entomology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Totan Adak
- Crop Protection Division, ICAR - National Rice Research Institute, Cuttack, India
| | | | | | - Annamalai Mahendiran
- Crop Protection Division, ICAR - National Rice Research Institute, Cuttack, India
| | - Prakash Chandra Rath
- Crop Protection Division, ICAR - National Rice Research Institute, Cuttack, India
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20
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Tanaka T, Suzuki J, Inomata A. Reproductive and neurobehavioral effects of dinotefuran in an F 1 -generation toxicity study in mice. Birth Defects Res 2023; 115:1534-1555. [PMID: 37548121 DOI: 10.1002/bdr2.2234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/07/2023] [Accepted: 07/20/2023] [Indexed: 08/08/2023]
Abstract
BACKGROUND Few studies were found for neurobehavioral toxicity of dinotefuran in mammals. This study was designed to evaluate the reproductive and neurobehavioral effects of dinotefuran exposure in mice. METHODS Dinotefuran was given in the diet to provide levels of 0% (control), 0.015%, 0.03%, and 0.06% from 5 weeks of age of the F0 generation to 11 weeks of age of the F1 generation in mice. Selected reproductive and neurobehavioral parameters were measured. RESULTS Movement time increased with a significant dose-related trend, and the related variables of rearing time decreased in significant dose-related trends in adult males in the F0 generation. Litter size and weight increased in significant dose-related trends, and sex ratio decreased in a significant dose-related trend. The average body weight of offspring increased in a significant dose-related trend on postnatal day (PND) 21 in both sexes. In the olfactory orientation on PND 14 in female offspring, the time required lengthened in a significant dose-related trend. In male offspring, total distance and the average speed decreased in significant dose-related trends, and the average time of rearing, number of defecations, and frequencies of mice with urination increased in a significant dose-related trend. In female offspring, the related variables of rearing increased in significant dose-related trends. In spontaneous behavior of males, the parallel lines during the control and treatment groups indicated a significant distance in the number of horizontal activities. CONCLUSIONS The dose levels of dinotefuran in the present study produced several adverse effects on reproductive and neurobehavioral parameters in mice.
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Affiliation(s)
- Toyohito Tanaka
- Division of Toxicology, Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, Tokyo, Japan
| | - Jin Suzuki
- Division of Toxicology, Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, Tokyo, Japan
| | - Akiko Inomata
- Department of Pharmaceutical and Environmental Sciences, Tokyo Metropolitan Institute of Public Health, Tokyo, Japan
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Du Y, Zhu YC, Portilla M, Zhang M, Reddy GVP. The mechanisms of metabolic resistance to pyrethroids and neonicotinoids fade away without selection pressure in the tarnished plant bug Lygus lineolaris. Pest Manag Sci 2023; 79:3893-3902. [PMID: 37222566 DOI: 10.1002/ps.7570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 05/16/2023] [Accepted: 05/22/2023] [Indexed: 05/25/2023]
Abstract
BACKGROUND Heavy selection pressure prompted the development of resistance in a serious cotton pest tarnished plant bug (TPB), Lygus Lineolaris in the mid-southern United States. Conversely, a laboratory resistant TPB strain lost its resistance to five pyrethroids and two neonicotinoids after 36 generations without exposure to any insecticide. It is worthwhile to examine why the resistance diminished in this population and determine whether the resistance fade away has practical value for insecticide resistance management in TPB populations. RESULTS A field-collected resistant TPB population in July (Field-R1) exhibited 3.90-14.37-fold resistance to five pyrethroids and two neonicotinoids, while another field-collected TPB population in April (Field-R2) showed much lower levels of resistance (0.84-3.78-fold) due to the absence of selection pressure. Interestingly, after 36 generations without exposure to insecticide, the resistance levels in the same population [laboratory resistant strain (Lab-R)] significantly decreased to 0.80-2.09-fold. The use of detoxification enzyme inhibitors had synergistic effects on permethrin, bifenthrin and imidacloprid in resistant populations of Lygus lineolaris. The synergism was more pronounced in Field-R2 than laboratory susceptible (Lab-S) and Lab-R TPB population. Moreover, esterase, glutathione S-transferase (GST), and cytochrome P450-monooxygenases (P450) enzyme activities increased significantly by approximately 1.92-, 1.43-, and 1.44-fold in Field-R1, respectively, and 1.38-fold increased P450 enzyme activities in Field-R2 TPB population, compared to the Lab-S TPB. In contrast, the three enzyme activities in the Lab-R strain were not significantly elevated anymore relative to the Lab-S population. Additionally, Field-R1 TPB showed elevated expression levels of certain esterase, GST and P450 genes, respectively, while Field-R2 TPB overexpressed only P450 genes. The elevation of these gene expression levels in Lab-R expectedly diminished to levels close to those of the Lab-S TPB populations. CONCLUSION Our results indicated that the major mechanism of resistance in TPB populations was metabolic detoxification, and the resistance development was likely conferred by increased gene expressions of esterase, GST, and P450 genes, the fadeaway of the resistance may be caused by reversing the overexpression of esterase, GST and P450. Without pesticide selection, resistant gene (esterase, GST, P450s) frequencies declined, and detoxification enzyme activities returned to Lab-S level, which resulted in the recovery of the susceptibility in the resistant TPB populations. Therefore, pest's self-purging of insecticide resistance becomes strategically desirable for managing resistance in pest populations. Published 2023. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Yuzhe Du
- USDA-ARS, Southern Insect Management Research Unit, Stoneville, MS, USA
| | - Yu-Cheng Zhu
- USDA-ARS, Pollinator Health in Southern Crop Ecosystem Research Unit, Stoneville, MS, USA
| | - Maribel Portilla
- USDA-ARS, Southern Insect Management Research Unit, Stoneville, MS, USA
| | - Minling Zhang
- USDA-ARS, Southern Insect Management Research Unit, Stoneville, MS, USA
| | - Gadi V P Reddy
- USDA-ARS, Southern Insect Management Research Unit, Stoneville, MS, USA
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22
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Liu S, Fu B, Zhang C, He C, Gong P, Huang M, Du T, Liang J, Wei X, Yang J, Yin C, Ji Y, Xue H, Hu J, Wang C, Zhang R, Du H, Yang X, Zhang Y. 20E biosynthesis gene CYP306A1 confers resistance to imidacloprid in the nymph stage of Bemisia tabaci by detoxification metabolism. Pest Manag Sci 2023; 79:3883-3892. [PMID: 37226658 DOI: 10.1002/ps.7569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/12/2023] [Accepted: 05/24/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND Difference in physiology level between the immature and mature stages of insects likely contribute to different mechanisms of insecticide resistance. It is well acknowledged that insect 20-hydroxyecdysone (20E) plays an important role in many biological processes in the immature stage, whether 20E confers insecticide resistance at this specific stage is still poorly understood. By gene cloning, reverse transcription quantitative real-time PCR, RNA interference (RNAi) and in vitro metabolism experiments, this study aimed to investigate the potential role of 20E-related genes in conferring imidacloprid (IMD) resistance in the immature stage of the whitefly Bemisia tabaci Mediterranean. RESULTS After identification of low to moderate IMD resistance in the whitefly, we found CYP306A1 of the six 20E-related genes was overexpressed in the nymph stage of the three resistant strains compared to a laboratory reference susceptible strain, but not in the adult stage. Further exposure to IMD resulted in an increase in CYP306A1 expression in the nymph stage. These results together imply that CYP306A1 may be implicated in IMD resistance in the nymph stage of the whitefly. RNAi knockdown of CYP306A1 increased the mortality of nymphs after treatment with IMD in bioassay, suggesting a pivotal role of CYP306A1 in conferring IMD resistance in the nymph stage. Additionally, our metabolism experiments in vivo showed that the content of IMD reduced by 20% along with cytochrome P450 reductase and heterologously expressed CYP306A1, which provides additional evidence for the important function of CYP306A1 in metabolizing IMD that leads to the resistance. CONCLUSION This study uncovers a novel function of the 20E biosynthesis gene CYP306A1 in metabolizing imidacloprid, thus contributing to such resistance in the immature stage of the insect. These findings not only advance our understanding of 20E-mediated insecticide resistance, but also provide a new target for sustainable pest control of global insect pests such as whitefly. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Shaonan Liu
- College of Plant Protection of Hunan Agricultural University, Changsha, China
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Buli Fu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chengjia Zhang
- Hunan Provincial Key Laboratory of Pesticide Biology and Precise Use Technology, Hunan Agricultural Biotechnology Research Institute, Changsha, China
| | - Chao He
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Peipan Gong
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Mingjiao Huang
- College of Plant Protection of Hunan Agricultural University, Changsha, China
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Tianhua Du
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jinjin Liang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xuegao Wei
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jing Yang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Cheng Yin
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yao Ji
- College of Plant Protection of Hunan Agricultural University, Changsha, China
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hu Xue
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jinyu Hu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chao Wang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Rong Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - He Du
- College of Plant Protection of Hunan Agricultural University, Changsha, China
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xin Yang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Youjun Zhang
- College of Plant Protection of Hunan Agricultural University, Changsha, China
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
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Shi C, Tian Y, Wang Y, Guo W, Jiang W. The interaction of nicotinic acetylcholine receptor subunits Ldα3, Ldα8 and Ldβ1 with neonicotinoids in Colorado potato beetle, Leptinotarsa decemlineata. Pestic Biochem Physiol 2023; 195:105558. [PMID: 37666594 DOI: 10.1016/j.pestbp.2023.105558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/14/2023] [Accepted: 07/25/2023] [Indexed: 09/06/2023]
Abstract
The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is an extremely destructive notifiable quarantine pest. Over the last two decades, neonicotinoid insecticides, particularly thiamethoxam and imidacloprid, have been used to control it in Xinjiang, and local field populations have developed different levels of resistance in consequence. However, the contributions of nicotinic acetylcholine receptors (nAChRs) to neonicotinoid resistance are currently poorly understood in CPB. Previous studies have shown that nAChRα1, α3, α8 and β1 are major target subunits for neonicotinoids in some model and important agricultural insects including nAChRα1 subunit of L. decemlineata (Ldα1). In this study, the expression levels of Ldα3, Ldα8 and Ldβ1 following 72 h of treatments with median lethal doses of thiamethoxam and imidacloprid were compared using real-time quantitative PCR. These genes were then individually and simultaneously knocked down with Ldα1 by RNA interference (RNAi) using a double-stranded RNA (dsRNA) feeding method for six days to explore their roles in CPB susceptibility to imidacloprid and thiamethoxam. The results showed that the expressions of Ldα3, Ldα8 and Ldβ1 were significantly decreased by 36.99-74.89% after thiamethoxam and imidacloprid treatments, compared with the control. The significant downregulation of the target genes resulting from RNAi significantly reduced the mortality of adults exposed to thiamethoxam and imidacloprid by 34.53% -56.44% and 28.78%-43.93%, respectively. Furthermore, the adult survival rates were not affected by every dsRNA-feeding treatment, while the body weight of the test adults significantly deceased after four and six days of individual gene RNAi. This study showed that Ldα3, Ldα8 and Ldβ1 are down-regulated by thiamethoxam and imidacloprid and play important roles in the tolerance of CPB to neonicotinoids.
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Affiliation(s)
- Chengcheng Shi
- College of Plant Protection, Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education/Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture, Nanjing 210095, China
| | - Yitong Tian
- College of Plant Protection, Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education/Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture, Nanjing 210095, China
| | - Yaqi Wang
- College of Plant Protection, Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education/Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture, Nanjing 210095, China
| | - Wenchao Guo
- Institute of Plant Protection, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management on Crop in Northwestern Oasis, Ministry Agriculture P.R. China, Urumqi, China
| | - Weihua Jiang
- College of Plant Protection, Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Disease and Pests, Ministry of Education/Key Laboratory of Integrated Pest Management on Crops in East China, Ministry of Agriculture, Nanjing 210095, China.
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24
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Grillberger K, Cöllen E, Trivisani CI, Blum J, Leist M, Ecker GF. Structural Insights into Neonicotinoids and N-Unsubstituted Metabolites on Human nAChRs by Molecular Docking, Dynamics Simulations, and Calcium Imaging. Int J Mol Sci 2023; 24:13170. [PMID: 37685977 PMCID: PMC10487998 DOI: 10.3390/ijms241713170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/10/2023] [Accepted: 08/12/2023] [Indexed: 09/10/2023] Open
Abstract
Neonicotinoid pesticides were initially designed in order to achieve species selectivity on insect nicotinic acetylcholine receptors (nAChRs). However, concerns arose when agonistic effects were also detected in human cells expressing nAChRs. In the context of next-generation risk assessments (NGRAs), new approach methods (NAMs) should replace animal testing where appropriate. Herein, we present a combination of in silico and in vitro methodologies that are used to investigate the potentially toxic effects of neonicotinoids and nicotinoid metabolites on human neurons. First, an ensemble docking study was conducted on the nAChR isoforms α7 and α3β4 to assess potential crucial molecular initiating event (MIE) interactions. Representative docking poses were further refined using molecular dynamics (MD) simulations and binding energy calculations using implicit solvent models. Finally, calcium imaging on LUHMES neurons confirmed a key event (KE) downstream of the MIE. This method was also used to confirm the predicted agonistic effect of the metabolite descyano-thiacloprid (DCNT).
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Affiliation(s)
- Karin Grillberger
- Department of Pharmaceutical Sciences, University of Vienna, 1090 Vienna, Austria
| | - Eike Cöllen
- In Vitro Toxicology and Biomedicine, University of Konstanz, 78457 Konstanz, Germany
| | | | - Jonathan Blum
- In Vitro Toxicology and Biomedicine, University of Konstanz, 78457 Konstanz, Germany
| | - Marcel Leist
- In Vitro Toxicology and Biomedicine, University of Konstanz, 78457 Konstanz, Germany
| | - Gerhard F. Ecker
- Department of Pharmaceutical Sciences, University of Vienna, 1090 Vienna, Austria
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Phogat A, Singh J, Kumar V, Malik V. Berberine mitigates acetamiprid-induced hepatotoxicity and inflammation via regulating endogenous antioxidants and NF-κB/TNF-α signaling in rats. Environ Sci Pollut Res Int 2023; 30:87412-87423. [PMID: 37421530 DOI: 10.1007/s11356-023-28279-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 06/12/2023] [Indexed: 07/10/2023]
Abstract
Acetamiprid is a neonicotinoid insecticide used on a large scale and has been reported for oxidative stress-mediated toxicity and physiological alterations in mammals. The plant-derived natural antioxidant berberine (BBR) possesses protective potential against inflammation, structural changes, and cellular toxicity. The current study aimed to investigate the toxic effects of acetamiprid exposure and the antioxidative and anti-inflammatory efficacy of BBR in rat liver tissue. The results showed that intragastric exposure of acetamiprid (21.7 mg/kg b.wt, i.e., 1/10 of LD50) for 21 days significantly elicited oxidative stress as evidenced by lipid peroxidation, protein oxidation, and depletion of endogenous antioxidants. Furthermore, acetamiprid exposure elevated NF-κB, TNF-α, IL-1β, IL-6, and IL-12 expression and caused structural alterations in liver tissue. Biochemical results showed that 2-h pre-treatment of BBR (150 mg/kg b.wt; 21 days) reduced damage to lipids and proteins, replenished GSH, enhanced SOD and catalase activities, and offered antioxidative effects against acetamiprid toxicity. Also, BBR suppressed inflammation by regulating NF-κB/TNF-α signaling in hepatic tissue of acetamiprid-intoxicated rats. Histopathological examination confirmed the hepatoprotective effects of BBR. Our findings indicate that BBR might be a potential ameliorative agent against oxidative stress-mediated hepatotoxicity.
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Affiliation(s)
- Annu Phogat
- Department of Zoology, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Jagjeet Singh
- Department of Zoology, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Vijay Kumar
- Department of Biochemistry, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Vinay Malik
- Department of Zoology, Maharshi Dayanand University, Rohtak, 124001, Haryana, India.
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Zhu X, Wei Q, Wan P, Wang W, Lai F, He J, Fu Q. Effect of Paclobutrazol Application on Enhancing the Efficacy of Nitenpyram against the Brown Planthopper, Nilaparvata lugens. Int J Mol Sci 2023; 24:10490. [PMID: 37445669 PMCID: PMC10341613 DOI: 10.3390/ijms241310490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/01/2023] [Accepted: 06/14/2023] [Indexed: 07/15/2023] Open
Abstract
The brown planthopper (BPH), Nilaparvata lugens, is one of the most destructive rice pests in Asia. It has already developed a high level of resistance to many commonly used insecticides including nitenpyram (NIT), which is a main synthetic insecticide that is used to control BPH with a much shorter persistence compared to other neonicotinoid insecticides. Recently, we found that an exogenous supplement of paclobutrazol (PZ) could significantly enhance the efficacy of NIT against BPH, and the molecular mechanism underlying this synergistic effect was explored. The results showed that the addition of a range of 150-300 mg/L PZ increased the toxicity of NIT against BPH with the highest mortalities of 78.0-87.0% on the 16th day after treatments, and PZ could also significantly prolong the persistence of the NIT efficacies. Further investigation suggested that PZ directly increased the content of flavonoids and H2O2 in rice and increased the activity of polyphenol oxidase, which might be involved in the constitutive defense of rice in advance. Additionally, there was an interaction between PZ and BPH infestation, indicating that PZ might activate the host defense responses. Therefore, PZ increased the efficacy of NIT against the brown planthoppers by enhancing the constitutive and inducible defense responses of rice. Our study showed for the first time that PZ could contribute to improving the control effects of insecticides via inducing the defense responses in rice plants against BPH, which provided an important theoretical basis for developing novel pest management strategies in the field.
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Affiliation(s)
| | - Qi Wei
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311401, China; (X.Z.); (P.W.); (W.W.); (F.L.); (J.H.)
| | | | | | | | | | - Qiang Fu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311401, China; (X.Z.); (P.W.); (W.W.); (F.L.); (J.H.)
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Zhang H, Ren X, Liu T, Zhao Y, Gan Y, Zheng L. The stereoselective toxicity of dinotefuran to Daphnia magna: A systematic assessment from reproduction, behavior, oxidative stress and digestive function. Chemosphere 2023; 327:138489. [PMID: 36996914 DOI: 10.1016/j.chemosphere.2023.138489] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Dinotefuran is a promising neonicotinoid insecticide with chiral structure. In the present study, the stereoselective toxicity of dinotefuran to Daphnia magna (D. magna) was studied. The present result showed that S-dinotefuran inhibited the reproduction of D. magna at 5.0 mg/L. However, both R-dinotefuran and S-dinotefuran had no genotoxicity to D. magna. Additionally, neither R-dinotefuran nor S-dinotefuran had negative influences on the motor behavior of D. magna. However, S-dinotefuran inhibited the feeding behavior of D. magna at 5.0 mg/L. Both R-dinotefuran and S-dinotefuran induced oxidative stress effect in D. magna after exposure. R-dinotefuran significantly activated the activities of superoxide dismutase (SOD) and glutathione S-transferase (GST), while S-dinotefuran showed the opposite effect. S-dinotefuran had more obvious activation effect on the acetylcholinesterase (AchE) activity and trypsin activity compared to R-dinotefuran. The transcriptome sequencing results showed that S-dinotefuran induced more DEGs in D. magna, and affected the normal function of ribosome. The DEGs were mainly related to the synthesis and metabolism of biomacromolecules, indicating the binding mode between dinotefuran enantiomer and biomacromolecules were different. Additionally, the present result indicated that the digestive enzyme activity and digestive gene expression levels in D. magna were greatly enhanced to cope with the inhibition of S-dinotefuran on the feeding.
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Affiliation(s)
- Hongyuan Zhang
- School of Agriculture, Ludong University, Yantai, 264025, China
| | - Xiangyu Ren
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences (CAAS), Qingdao, 266101, China
| | - Tong Liu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences (CAAS), Qingdao, 266101, China.
| | - Ying Zhao
- College of Resources and Environmental Engineering, Ludong University, Yantai, Shandong, 264025, China
| | - Yantai Gan
- College of Resources and Environmental Engineering, Ludong University, Yantai, Shandong, 264025, China
| | - Lei Zheng
- State Environmental Protection Key Laboratory of Dioxin Pollution, National Research Center of Environmental Analysis and Measurement, Sino-Japan Friendship Center for Environmental Protection, Beijing, 100029, China.
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Zhang YC, Gao Y, Ye WN, Peng YX, Zhu KY, Gao CF. CRISPR/Cas9-mediated knockout of NlCYP6CS1 gene reveals its role in detoxification of insecticides in Nilaparvata lugens (Hemiptera: Delphacidae). Pest Manag Sci 2023; 79:2239-2246. [PMID: 36775840 DOI: 10.1002/ps.7404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/25/2022] [Accepted: 02/13/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND The brown planthopper (Nilaparvata lugens) is one of the major rice insect pests in Asia. Recently, high levels of insecticide resistance have been frequently reported and cytochrome P450 monooxygenase (P450)-mediated metabolic detoxification is a common resistance mechanism in N. lugens. However, there has been no persuasive genetic method to prove the role of P450s in insecticide resistance in N. lugens. RESULTS Here, CRISPR/Cas9 system was used to disrupt the P450 gene NlCYP6CS1 to elucidate its role in insecticide resistance in field populations of N. lugens. We successfully constructed a homozygous strain (Nl6CS1-KO) with a 5-bp deletion and 1-bp insertion mutation of NlCYP6CS1. Compared with a background resistant strain (Nl-R), the susceptibility of knockout strain Nl6CS1-KO to imidacloprid, nitenpyram, thiamethoxam, dinotefuran, and pymetrozine was increased by 2.3-, 3.4-, 7.0-, 4.2- and 3.9-fold, respectively, but not significantly changed to triflumezopyrim, chlorpyrifos and buprofezin. Life table analysis demonstrated that the Nl6CS1-KO strain resembled the Nl-R strain in terms of egg and nymph developmental duration and adult lifespan, but differed from the Nl-R strain in the survival rate of eggs and nymphs, reproduction, and body weight. CONCLUSIONS Our study demonstrates the effect of functional deletion of NlCYP6CS1 on multiple insecticide resistance in N. lugens. For the first time, we applied CRISPR/Cas9 system to reveal the mechanism of insecticide resistance in N. lugens, which may shed light on similar studies in other hemipteran insects. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yan-Chao Zhang
- College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide-Invention and Application, Nanjing, China
| | - Yang Gao
- College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide-Invention and Application, Nanjing, China
| | - Wen-Nan Ye
- College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide-Invention and Application, Nanjing, China
| | - Yu-Xuan Peng
- College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide-Invention and Application, Nanjing, China
| | - Kun Yan Zhu
- Department of Entomology, Kansas State University, Manhattan, KS, USA
| | - Cong-Fen Gao
- College of Plant Protection, Nanjing Agricultural University/State & Local Joint Engineering Research Center of Green Pesticide-Invention and Application, Nanjing, China
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Kirkland LS, Chirgwin E, Ward SE, Congdon BS, van Rooyen A, Umina PA. P450-mediated resistance in Myzus persicae (Sulzer) (Hemiptera: Aphididae) reduces the efficacy of neonicotinoid seed treatments in Brassica napus. Pest Manag Sci 2023; 79:1851-1859. [PMID: 36651838 DOI: 10.1002/ps.7362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/14/2022] [Accepted: 01/18/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND The prophylactic use of seeds treated with neonicotinoid insecticides remains an important means of controlling aphid pests in canola (Brassica napus) crops in many countries. Yet, one of the most economically important aphid species worldwide, the peach potato aphid (Myzus persicae), has evolved mechanisms which confer resistance to neonicotinoids, including amplification of the cytochrome P450 gene, CYP6CY3. While CYP6CY3 amplification has been associated with low-level resistance to several neonicotinoids in laboratory acute toxicity bioassays, its impact on insecticide efficacy in the field remains unresolved. In this study, we investigated the impact of CYP6CY3 amplification on the ability of M. persicae to survive neonicotinoid exposure under laboratory and semi-field conditions. RESULTS Three M. persicae clones, possessing different copy numbers of CYP6CY3, were shown to respond differently when exposed to the neonicotinoids, imidacloprid and thiamethoxam, in laboratory bioassays. Two clones, EastNaernup209 and Osborne171, displayed low levels of resistance (3-20-fold), which is consistent with previous studies. However, in a large-scale semi-field trial, both clones showed a surprising ability to survive and reproduce on B. napus seedlings grown from commercial rates of neonicotinoid-treated seed. In contrast, an insecticide-susceptible clone, of wild-type CYP6CY3 copy number, was unable to survive on seedlings treated in the same manner. CONCLUSION Our findings suggest that amplification of CYP6CY3 in M. persicae clones substantially impairs the efficacy of neonicotinoid seed treatments when applied to B. napus. These findings highlight the potentially important real-world implications of resistances typically considered to be 'low level' as defined through laboratory bioassays. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | | | | | - Benjamin S Congdon
- Department of Primary Industries and Regional Development, South Perth, Australia
| | | | - Paul A Umina
- Cesar Australia, Brunswick, Australia
- School of BioSciences, The University of Melbourne, Parkville, Australia
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Liu S, Wang T, Lu J, Li Z. Seawater quality criteria derivation and ecological risk assessment for the neonicotinoid insecticide imidacloprid in China. Mar Pollut Bull 2023; 190:114871. [PMID: 37023546 DOI: 10.1016/j.marpolbul.2023.114871] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 03/16/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
As a broad-spectrum nicotinoid insecticide, imidacloprid (IMI) has been frequently recorded in seawater environments. Water quality criteria (WQC) is the maximum concentration of chemicals, which will not pose harmful effects on aquatic species in the studied water body. Nevertheless, the WQC is not available for IMI in China, which hinders the risk assessment of this emerging pollutant. This study, therefore, aims to derive the WQC for IMI through the toxicity percentile rank (TPR) and species sensitivity distribution (SSD) methodology, and to assess its ecological risk in aquatic environments. Results showed that the recommended short-term water quality criterion (SWQC) and long-term criterion (LWQC) in seawater were derived as 0.8 μg/L and 0.056 μg/L, respectively. The ecological risk of IMI in seawater shows a wide range with hazard quotient (HQ) values of up to 11.4. The environmental monitoring, risk management and pollution control for IMI, therefore, warrant further study.
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Affiliation(s)
- Shuai Liu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Teng Wang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jinyu Lu
- College of Environment, Nanjing University, Nanjing 210000, China
| | - Zhengyan Li
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
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31
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Ozoe Y, Matsubara Y, Tanaka Y, Yoshioka Y, Ozoe F, Shiotsuki T, Nomura K, Nakao T, Banba S. Controlled expression of nicotinic acetylcholine receptor-encoding genes in insects uncovers distinct mechanisms of action of the neonicotinoid insecticide dinotefuran. Pestic Biochem Physiol 2023; 191:105378. [PMID: 36963946 DOI: 10.1016/j.pestbp.2023.105378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/12/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Dinotefuran, a neonicotinoid, is a unique insecticide owing to its structure and action. We took two approaches that employed insects with controlled expression of nicotinic acetylcholine receptor (nAChR)-encoding genes to gain insight into the uniqueness of dinotefuran. First, we examined the insecticidal activity of dinotefuran and imidacloprid against brown planthoppers (Nilaparvata lugens), in which the expression of eight (of 13) individual subunit-encoding genes was specifically reduced using RNA interference. Knockdown of the tested gene, except one, resulted in a decrease in sensitivity to imidacloprid, whereas the sensitivity of N. lugens to dinotefuran decreased only when two of the eight genes were knocked down. These findings imply that a major dinotefuran-targeted nAChR subtype may contain specific subunits although imidacloprid acts on a broad range of receptor subtypes. Next, we examined the effects of knockout of Drosophila α1 subunit-encoding gene (Dα1) on the insecticidal effects of dinotefuran and imidacloprid. Dα1-deficient flies (Dα1KO) demonstrated the same sensitivity to dinotefuran as control flies, but a decreased sensitivity to imidacloprid. This difference was attributed to a reduction in imidacloprid-binding sites in Dα1KO flies, whereas the binding of dinotefuran remained unchanged. RNA sequencing analysis indicated that Dα2 expression was specifically enhanced in Dα1KO flies. These findings suggest that changes in Dα1 and Dα2 expression contribute to the differences in the insecticidal activity of dinotefuran and imidacloprid in Dα1KO flies. Overall, our findings suggest that dinotefuran acts on distinct nAChR subtypes.
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Affiliation(s)
- Yoshihisa Ozoe
- Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan; Interdisciplinary Institute for Science Research, Organization for Research and Academic Information, Shimane University, Matsue, Shimane 690-8504, Japan.
| | - Yoshiki Matsubara
- Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Yuji Tanaka
- Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Yasuhide Yoshioka
- Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Fumiyo Ozoe
- Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan; Interdisciplinary Institute for Science Research, Organization for Research and Academic Information, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Takahiro Shiotsuki
- Faculty of Life and Environmental Sciences, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Kazuki Nomura
- Agrochemicals Research Center, Mitsui Chemicals Agro, Inc., Mobara, Chiba 297-0017, Japan
| | - Toshifumi Nakao
- Agrochemicals Research Center, Mitsui Chemicals Agro, Inc., Mobara, Chiba 297-0017, Japan
| | - Shinichi Banba
- Agrochemicals Research Center, Mitsui Chemicals Agro, Inc., Mobara, Chiba 297-0017, Japan
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Li Z, Li W, Qin W, Liu J, He Y. Ampicillin enhanced the resistance of Myzus persicae to imidacloprid and cyantraniliprole. Pest Manag Sci 2023; 79:1388-1398. [PMID: 36453026 DOI: 10.1002/ps.7310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/09/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Recent studies have shown that symbionts are involved in regulating insecticide detoxification in insects. However, there are few studies on the relationship between the symbionts found in Myzus persicae and the mechanism underlying host detoxification of insecticides. In this study, antibiotic ampicillin treatment was used to investigate the possible relationship between symbiotic bacteria and the detoxification of insecticides in the host, M. persicae. RESULTS Bioassays showed that ampicillin significantly reduced the susceptibilities of M. persicae to imidacloprid and cyantraniliprole. Synergistic bioassays and RNAi assays showed that the susceptibilities of M. persicae to imidacloprid and cyantraniliprole were related to metabolic detoxification enzyme activities and the expression level of the cytochrome P450 gene, CYP6CY3. Also, treatment to a combination of ampicillin and enzyme inhibitors or dsCYP6CY3 showed that the negative effect of ampicillin on the susceptibility of M. persicae was effectively inhibited bydetoxification enzyme inhibitors and dsCYP6CY3. Additionally, ampicillin treatment resulted in significant increases in the activities of multifunctional oxidases and esterases, the expression level of CYP6CY3 and fitness of M. persicae. Further, ampicillin significantly reduced the total bacterial abundance and changed symbiont diversity in M. persicae. The abundance of Pseudomonadaceae decreased significantly, while the abundance of Rhodococcus and Buchnera increased significantly. CONCLUSION Our study showed that ampicillin enhanced the resistance levels to imidacloprid and cyantraniliprole of M. persicae, which might be related to the selective elimination of symbiotic bacteria, the upregulated activities of detoxification enzymes and the increased fitness. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Zengxin Li
- College of Plant Science and Technology, Hubei Key Laboratory of Insect Resource Application and Sustainable Pest Control, Huazhong Agricultural University, Wuhan, China
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, China
| | - Wenhong Li
- Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang, China
| | - Weiwei Qin
- College of Plant Science and Technology, Hubei Key Laboratory of Insect Resource Application and Sustainable Pest Control, Huazhong Agricultural University, Wuhan, China
| | - Jingyou Liu
- College of Plant Science and Technology, Hubei Key Laboratory of Insect Resource Application and Sustainable Pest Control, Huazhong Agricultural University, Wuhan, China
| | - Yueping He
- College of Plant Science and Technology, Hubei Key Laboratory of Insect Resource Application and Sustainable Pest Control, Huazhong Agricultural University, Wuhan, China
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Zhang H, Zou J, Yang B, Zhang Y, Liu Z. Importance of CYP6ER1 Was Different among Neonicotinoids in Their Susceptibility in Nilaparvata lugens. J Agric Food Chem 2023; 71:4163-4171. [PMID: 36812404 DOI: 10.1021/acs.jafc.2c07692] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
CYP6ER1 overexpression is a prevalent mechanism for neonicotinoid resistance in Nilaparvata lugens. Except for imidacloprid, the metabolism of other neonicotinoids by CYP6ER1 lacked direct evidence. In this study, a CYP6ER1 knockout strain (CYP6ER1-/-) was constructed using the CRISPR/Cas9 strategy. The CYP6ER1-/- strain showed much higher susceptibility to imidacloprid and thiacloprid with an SI (sensitivity index, LC50 of WT/LC50 of CYP6ER1-/-) of over 100, which was 10-30 for four neonicotinoids (acetamiprid, nitenpyram, clothianidin, and dinotefuran) and less than 5 for flupyradifurone and sulfoxaflor. Recombinant CYP6ER1 showed the highest activity to metabolize imidacloprid and thiacloprid and moderate activity for the other four neonicotinoids. Main metabolite identification and oxidation site prediction revealed that CYP6ER1 activities were insecticide structure-dependent. The most potential oxidation site of imidacloprid and thiacloprid was located in the five-membered heterocycle with hydroxylation activity. For the other four neonicotinoids, the potential site was within the ring opening of a five-membered heterocycle, indicating N-desmethyl activity.
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Affiliation(s)
- Huihui Zhang
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Jianzheng Zou
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Baojun Yang
- Rice Technology Research and Development Center, China National Rice Research Institute, Stadium 359, Hangzhou 310006, China
| | - Yixi Zhang
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Zewen Liu
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
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Mahas JW, Steury TD, Huseth AS, Jacobson AL. Imidacloprid-resistant Aphis gossypii populations are more common in cotton-dominated landscapes. Pest Manag Sci 2023; 79:1040-1047. [PMID: 36327354 DOI: 10.1002/ps.7274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 10/26/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Widespread reports of reduced efficacy of imidacloprid for managing cotton aphids (Aphis gossypii Glover) in cotton (Gossypium hirsutum L.) prompted an investigation to characterize the susceptibility of 43 populations over a 2-year period. The susceptibility of A. gossypii populations to imidacloprid was examined by calculating LC50 values. Further analyses related resistance assay results to a gradient of cotton production intensity. RESULTS Concentration-mortality bioassays documencted populations that were 4.26-607.16 times more resistant than the susceptible laboratory population. There was a significant positive relationship between LC50 values and percentage of cotton within 2.5- and 5-km buffers surrounding collection sites. No significant relationship was detected between LC50 values and the percentage of alternative crop and noncrop hosts. CONCLUSION Variable and high levels of resistance were detected in A. gossypii populations, and this variation was positively associated with cotton production intensity. Cotton is a host that may receive multiple applications of neonicotinoids (via seed treatment and foliar sprays) annually for seedling and mid-season pests. Rotating modes of action and limiting insecticide use should be implemented to delay the evolution of insecticide resistance in A. gossypii populations. © 2022 Society of Chemical Industry.
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Affiliation(s)
- John W Mahas
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
| | - Todd D Steury
- School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, USA
| | - Anders S Huseth
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, USA
| | - Alana L Jacobson
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA
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Dang K, Doggett SL, Lee CY. Performance of Pyrethroid-Neonicotinoid Mixture Formulations Against Field-Collected Strains of the Tropical Bed Bug (Hemiptera: Cimicidae) on Different Substrates. J Econ Entomol 2023; 116:29-39. [PMID: 35639556 DOI: 10.1093/jee/toac068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Indexed: 06/15/2023]
Abstract
The residual performance of two pyrethroid-neonicotinoid mixture formulations: Temprid SC (10.5% beta-cyfluthrin and 21% imidacloprid) and Tandem (3.5% lambda-cyhalothrin and 11.6% thiamethoxam) on two substrates (glass and filter paper) against eight pyrethroid-resistant strains (BM-MY, BP-MY, CH-MY, GL-MY, KL-MY, SAJ-MY, TT-MY, and QLD-AU) of the tropical bed bug, Cimex hemipterus (F.) (Hemiptera: Cimicidae) collected from Malaysia, and Australia were evaluated. The aging effect of treatment residues on glass was also investigated. A susceptible C. lectularius L. strain (Monheim) was used for comparison. Temprid SC showed varying levels of performance against all C. hemipterus strains: TT-MY (PR50 = 6.5-fold, high performance), BM-MY, GL-MY, SAJ-MY, and QLD-AU (12.8-21.6-fold, moderate performance), BP-MY, and KL-MY (48.2-49-fold, poor performance), CH-MY (128.2-fold, very poor performance). On the other hand, Tandem displayed high performance against all C. hemipterus strains (1.8-8.3-fold). Tandem caused faster mortality than Temprid SC for all strains. Temprid SC and Tandem residues killed C. hemipterus significantly faster on glass than filter paper. Compared with fresh residues, the efficacy of Temprid SC residues significantly declined after one week of aging, while the effectiveness of Tandem residues declined after two weeks of aging. Further investigations using the topical assay method with a diagnostic dose of imidacloprid found two strains (CH-MY and GL-MY) resistant to imidacloprid. The six other strains (BM-MY, BP-MY, KL-MY, SAJ-MY, TT-MY, and QLD-AU) were susceptible.
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Affiliation(s)
- Kai Dang
- Department of Medical Entomology, NSW Health Pathology-ICPMR, Westmead Hospital, Westmead, NSW, Australia
- Urban Entomology Laboratory, Vector Control Research Unit, School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Stephen L Doggett
- Department of Medical Entomology, NSW Health Pathology-ICPMR, Westmead Hospital, Westmead, NSW, Australia
| | - Chow-Yang Lee
- Urban Entomology Laboratory, Vector Control Research Unit, School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
- Department of Entomology, University of California, Riverside, CA, USA
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Che-Mendoza A, González-Olvera G, Medina-Barreiro A, Arisqueta-Chablé C, Herrera-Bojórquez J, Bibiano-Marín W, Kirstein O, Vazquez-Prokopec GM, Manrique-Saide P. Residual efficacy of the neonicotinoid insecticide clothianidin against pyrethroid-resistant Aedes aegypti. Pest Manag Sci 2023; 79:638-644. [PMID: 36223080 PMCID: PMC9845138 DOI: 10.1002/ps.7231] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/06/2022] [Accepted: 10/12/2022] [Indexed: 05/16/2023]
Abstract
BACKGROUND Here we report the residual efficacy of the neonicotinoid insecticide clothianidin against pyrethroid-resistant Aedes aegypti. We first conducted a range-finding evaluation of clothianidin on three different substrates (wall, wood, cloth) using three doses (100, 300 and 600 mg a.i. m-2 ) and conducting World Health Organization (WHO) cone bioassays to assess acute (24 h) and delayed (up to 7 days) mortality. In experimental houses located in Merida (Mexico) and using free-flying pyrethroid-resistant Ae. aegypti females, we quantified the acute and delayed mortality after a 24-h exposure to the targeted indoor residual spraying (TIRS) of two clothianidin doses (100 and 300 mg a.i. m-2 ). RESULTS Range-finding studies with WHO cones showed low (<50%) acute mortality for all surfaces, doses and times post spraying. Delayed mortality was higher, with average values above or close to the 60% mark (and 95% confidence interval estimates crossing 80% for the 600 mg a.i. m-2 dose). In experimental houses, a similar low acute mortality was quantified (range of mortality across 12 months was 2-44% for 100 mg a.i. m-2 and 8-61% for 300 mg a.i/m2 ). However, delayed mortality showed a strong effect of clothianidin on free-flying Ae. aegypti, with values above 80% up to 7 months post-TIRS. CONCLUSION Novel residual insecticide molecules have a promising outlook for Ae. aegypti control and can contribute to the expansion and adoption of TIRS in urban areas. clothianidin can contribute to the control of resistant Ae. aegypti and provide residual control for up to 7 months after application. © 2022 Society of Chemical Industry.
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Affiliation(s)
- A Che-Mendoza
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
| | - G González-Olvera
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
| | - A Medina-Barreiro
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
| | - C Arisqueta-Chablé
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
| | - J Herrera-Bojórquez
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
| | - W Bibiano-Marín
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
| | - O Kirstein
- Department of Environmental Sciences, Emory University, Mathematics and Science Center, 400 Dowman Drive Ste: E530, Atlanta, GA 30322, USA
| | - GM Vazquez-Prokopec
- Department of Environmental Sciences, Emory University, Mathematics and Science Center, 400 Dowman Drive Ste: E530, Atlanta, GA 30322, USA
| | - P Manrique-Saide
- Unidad Colaborativa para Bioensayos Entomologicos, Universidad Autonoma de Yucatan, Mexico
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Martins CAH, Caliani I, D'Agostino A, Di Noi A, Casini S, Parrilli M, Azpiazu C, Bosch J, Sgolastra F. Biochemical responses, feeding and survival in the solitary bee Osmia bicornis following exposure to an insecticide and a fungicide alone and in combination. Environ Sci Pollut Res Int 2023; 30:27636-27649. [PMID: 36383317 PMCID: PMC9995414 DOI: 10.1007/s11356-022-24061-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
In agricultural ecosystems, bees are exposed to combinations of pesticides that may have been applied at different times. For example, bees visiting a flowering crop may be chronically exposed to low concentrations of systemic insecticides applied before bloom and then to a pulse of fungicide, considered safe for bees, applied during bloom. In this study, we simulate this scenario under laboratory conditions with females of the solitary bee, Osmia bicornis L. We studied the effects of chronic exposure to the neonicotinoid insecticide, Confidor® (imidacloprid) at a realistic concentration, and of a pulse (1 day) exposure of the fungicide Folicur® SE (tebuconazole) at field application rate. Syrup consumption, survival, and four biomarkers: acetylcholinesterase (AChE), carboxylesterase (CaE), glutathione S-transferase (GST), and alkaline phosphatase (ALP) were evaluated at two different time points. An integrated biological response (IBRv2) index was elaborated with the biomarker results. The fungicide pulse had no impact on survival but temporarily reduced syrup consumption and increased the IBRv2 index, indicating potential molecular alterations. The neonicotinoid significantly reduced syrup consumption, survival, and the neurological activity of the enzymes. The co-exposure neonicotinoid-fungicide did not increase toxicity at the tested concentrations. AChE proved to be an efficient biomarker for the detection of early effects for both the insecticide and the fungicide. Our results highlight the importance of assessing individual and sub-individual endpoints to better understand pesticide effects on bees.
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Affiliation(s)
- Cátia Ariana Henriques Martins
- Department of Agricultural and Food Sciences, Alma Mater Studiorum Università Di Bologna, Viale Fanin 42, 40127, Bologna, Italy
| | - Ilaria Caliani
- Department of Physical, Earth and Environmental Sciences, University of Siena, Via Mattioli 4, 53100, Siena, Italy
| | - Antonella D'Agostino
- Department of Management and Quantitative Studies, University of Naples Parthenope, Naples, Italy
| | - Agata Di Noi
- Department of Life Sciences, University of Siena, Via Mattioli, 4, 53100, Siena, Italy.
| | - Silvia Casini
- Department of Physical, Earth and Environmental Sciences, University of Siena, Via Mattioli 4, 53100, Siena, Italy
| | - Martina Parrilli
- Department of Agricultural and Food Sciences, Alma Mater Studiorum Università Di Bologna, Viale Fanin 42, 40127, Bologna, Italy
| | - Celeste Azpiazu
- Institute of Evolutionary Biology (CSIC-Universitat Pompeu Fabra), Passeig Marítim de La Barceloneta 37, 08003, Barcelona, Spain
- Universidad Politécnica de Madrid, 28040, Madrid, Spain
| | - Jordi Bosch
- CREAF, Universitat Autònoma de Barcelona, 08193, Barcelona, Bellaterra, Spain
| | - Fabio Sgolastra
- Department of Agricultural and Food Sciences, Alma Mater Studiorum Università Di Bologna, Viale Fanin 42, 40127, Bologna, Italy
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Li K, Liu J, Geng Z, Xu W, Zhang Z, Chu D, Guo L. Resistance to dinotefuran in Bemisia tabaci in China: status and characteristics. Pest Manag Sci 2023; 79:833-844. [PMID: 36264629 DOI: 10.1002/ps.7251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 10/08/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Bemisia tabaci (Gennadius) is a serious agricultural pest worldwide. Neonicotinoids are the most important new class of synthetic insecticides used in the management of B. tabaci. However, B. tabaci populations have developed resistance to various active ingredients in neonicotinoids following long-term and widespread application. RESULTS Dinotefuran exhibited high toxicity against most B. tabaci field populations. One population (Din-R) with a high level of resistance to dinotefuran (255.6-fold) was first identified in the field. The Din-R population exhibited medium to high levels of resistance to all the tested neonicotinoid insecticides and a high level of resistance to spinetoram. Genetic inheritance analysis revealed that resistance to dinotefuran was incompletely recessive and polygenic. The synergist piperonyl butoxide significantly increased the toxicity of dinotefuran to Din-R. P450 activity in the Din-R population was 2.19-fold higher than in the susceptible population. RNA-sequencing analysis showed that 12 P450 genes were significantly upregulated in the Din-R population, of which CYP6DW5, CYP6JM1 and CYP306A1 were found to exhibit more than 3.00-fold higher expression in Din-R when using a reverse transcription quantitative real-time polymerase chain reaction. Expression of eight P450 genes was obviously induced by dinotefuran, and CYP6DW5 showed the highest expression level. After knockdown of CYP6DW5 in Din-R, the toxicity of dinotefuran increased significantly. CONCLUSION P450 had a crucial role in dinotefuran resistance in B. tabaci, and CYP6DW5 was involved in the resistance. These results provide important information for the management of resistance in B. tabaci and improve our understanding of the resistance mechanism of dinotefuran. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Kaixin Li
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, People's Republic of China
| | - Jiantao Liu
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, People's Republic of China
| | - Ziqiong Geng
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, People's Republic of China
| | - Wei Xu
- Food Futures Institute, Murdoch University, Murdoch, Australia
| | - Zhuang Zhang
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, People's Republic of China
| | - Dong Chu
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, People's Republic of China
| | - Lei Guo
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, People's Republic of China
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Frizzi F, Balzani P, Masoni A, Frasconi Wendt C, Marconi M, Rossi A, Santini G. Sub-lethal doses of imidacloprid alter food selection in the invasive garden ant Lasius neglectus. Environ Sci Pollut Res Int 2023; 30:27501-27509. [PMID: 36385335 PMCID: PMC9995417 DOI: 10.1007/s11356-022-24100-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Despite several restrictions to their use, neonicotinoid insecticides are still widely employed worldwide. Residual sub-lethal amounts of these chemicals can have detrimental effects on the behavior of non-target insects. Toxic effects on economically important species such as bees have been widely documented, but less is known about their toxic action on other social insects, such as ants. In this study, we assessed the effect of different sub-lethal doses of the neonicotinoid imidacloprid on the ability of colonies of the invasive ant Lasius neglectus to select the most profitable resource. We used Y-shaped mazes having an imidacloprid-polluted or an unpolluted sucrose solution on the two branches. Two sucrose (0.1 M, 0.5 M) and two imidacloprid (1 μg/ml, 10 μg/ml) concentrations were used. In parallel, we evaluated the marking activity of foragers who fed on the same solutions. We found that the 0.1 M sugar solution polluted with 1 μg/ml imidacloprid was significantly more frequently selected in binary choices experiments than the unpolluted resource. Moreover, the ingestion of the same combination of sugar and imidacloprid significantly increased the marking rate of foragers. The higher concentration of the pollutant had lower effects, probably because of the hormesis phenomenon. Results suggest that the lower sub-lethal dose of imidacloprid can lead ants to select again the polluted resource. This "active" selection of the pollutant may magnify the negative effects on the colonies. Due to their ecological role, any impairment of ant survival or behavior may have detrimental cascade effects on the whole ecosystem.
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Affiliation(s)
- Filippo Frizzi
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy.
| | - Paride Balzani
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší, 728/II, 38925, Vodňany, Czech Republic
| | - Alberto Masoni
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy
| | - Clara Frasconi Wendt
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy
- cE3c, Centre for Ecology, Evolution and Environmental Changes, Faculty of Science, University of Lisbon, Lisbon, Portugal
| | - Matilde Marconi
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy
| | - Asia Rossi
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy
| | - Giacomo Santini
- Department of Biology, University of Florence, Via Madonna del Piano, 6, Sesto F.No., 50019, Florence, Italy
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Huang W, Yang Q, Ji X, Wang L, Wang Q, Rui C, Cui L. An insecticide phenotypic resistance diagnostic kit for cotton aphid Aphis gossypii Glover (Hemiptera Aphididae). Pest Manag Sci 2022; 78:5463-5470. [PMID: 36067017 DOI: 10.1002/ps.7169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 07/29/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Aphis gossypii is a notorious pest worldwide, and evidence of resistance of A. gossypii to various insecticides has been documented. Diagnostic tools for the rapid and accurate assessment of insecticide resistance are urgently needed to implement effective pest control and insecticide resistance management strategies. RESULTS Using this diagnostic kit based on the glass vial bioassay, detection results can be obtained in 3 h and the values of 897.86, 133.57, 12 037.45, 2849.26, 19 457.33 and 215.60 ng/cm2 were finally identified as the actual diagnostic doses of imidacloprid, acetamiprid, thiamethoxam, nitenpyram, dinotefuran and sulfoxaflor, respectively. The regression equation between mortalities under diagnostic doses and actual resistance ratios tested by the leaf-dipping method were conducted in different strains of A. gossypii, and the diagnostic mortality of A. gossypii was negatively correlated with the resistance ratio to imidacloprid (r = -0.986, P = 0.002), acetamiprid (r = -0.964, P = 0.008), thiamethoxam (r = -0.930, P = 0.022), nitenpyram (r = -0.950, P = 0.013), dinotefuran (r = -0.976, P = 0.004) and sulfoxaflor (r = -0.937, P = 0.019). Moreover, four A. gossypii field populations were selected to apply the diagnostic kit in the field. CONCLUSIONS A diagnostic kit based on the glass vial bioassay for the rapid detection of resistance to imidacloprid, acetamiprid, thiamethoxam, nitenpyram, dinotefuran and sulfoxaflor in A. gossypii was developed. The insecticide diagnostic kit for A. gossypii can be a useful screening tool to determine effective insecticides quickly and accurately. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Weiling Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Qingjie Yang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Xuejiao Ji
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Li Wang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Qinqin Wang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Changhui Rui
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Li Cui
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Beijing, China
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Lv Y, Wen S, Ding Y, Gao X, Chen X, Yan K, Yang F, Pan Y, Shang Q. Functional Validation of the Roles of Cytochrome P450s in Tolerance to Thiamethoxam and Imidacloprid in a Field Population of Aphis gossypii. J Agric Food Chem 2022; 70:14339-14351. [PMID: 36165284 DOI: 10.1021/acs.jafc.2c04867] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Field populations of Aphis gossypii (SDR) have evolved high resistance to neonicotinoids, including thiamethoxam and imidacloprid. Synergism bioassays and transcriptomic comparison of the SDR and susceptible (SS) strains revealed that the cytochrome P450s may contribute to the neonicotinoid resistance evolution. The transcripts of some P450s were constitutively overexpressed in the SDR strain, and many genes showed expression plasticity under insecticide exposure. Drosophila that ectopically expressed CYPC6Y9, CYP4CK1, CYP6DB1, and CYP6CZ1 showed greater resistance (>8.0-fold) to thiamethoxam, and Drosophila that expressed CYPC6Y9, CYP6CY22, CYP6CY18, and CYP6D subfamily genes showed greater resistance (>5-fold) to imidacloprid. Five P450 genes that caused thiamethoxam resistance also conferred resistance to α-cypermethrin. Furthermore, the knockdown of CYP4CK1, CYP6CY9, CYP6CY18, CYPC6Y22, CYP6CZ1, and CYP6DB1 dramatically increased the sensitivity of the SDR strain to thiamethoxam or imidacloprid. These results indicate the involvement of multiple P450 genes, rather than one key gene, in neonicotinoid resistance in field populations.
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Affiliation(s)
- Yuntong Lv
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
| | - Shuyun Wen
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
| | - Yaping Ding
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing 100193, P.R. China
| | - Xuewei Chen
- School of Agricultural Science, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Kunpeng Yan
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
| | - Fengting Yang
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
| | - Yiou Pan
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
| | - Qingli Shang
- College of Plant Science, Jilin University, Changchun 130062, P.R. China
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Hubbard CB, Murillo AC. Concentration Dependent Feeding on Imidacloprid by Behaviorally Resistant House Flies, Musca domestica L. (Diptera: Muscidae). J Med Entomol 2022; 59:2066-2071. [PMID: 36153656 DOI: 10.1093/jme/tjac130] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Indexed: 06/16/2023]
Abstract
The house fly (Musca domestica L.) is a cosmopolitan and synanthropic pest fly commonly associated with confined animal facilities, known to mechanically vector numerous disease-causing pathogens. Control of adult house flies often relies on insecticides formulated into insecticidal baits, though many baits have failed due to insecticide resistance. House fly resistance to imidacloprid, the most widely used neonicotinoid insecticide available for fly control, has evolved through physiological and behavioral mechanisms in field populations. Behavioral resistance to imidacloprid was documented in field populations of flies from southern California dairies. Lab colonies of these flies were established and behavioral resistance to imidacloprid was selected over several generations. The current study examined the ability of these lab-selected flies to feed on varying concentrations of imidacloprid formulated in sucrose, and if these flies would demonstrate a feeding preference for different concentrations of imidacloprid when exposed in bioassays. Behaviorally resistant flies preferred to feed on untreated sucrose as opposed to treated sucrose at concentrations greater than 25 µg/g imidacloprid when provided sucrose treated with and without imidacloprid. When provisioned with only sucrose treated with a low and high imidacloprid concentration, flies fed on the low concentrations (≤100 µg/g) imidacloprid but reduced feeding on either treatment when concentrations were >100 µg/g imidacloprid. The current study extends the body of knowledge on house fly behavioral resistance to imidacloprid, which could provide insights into future failures of granular fly baits.
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Affiliation(s)
- Caleb B Hubbard
- Department of Entomology, University of California, Riverside, CA 92521, USA
| | - Amy C Murillo
- Department of Entomology, University of California, Riverside, CA 92521, USA
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Abdel razik MAA, Al Dhafar ZM, Alqahtani AM, Osman MA, Sweelam ME. Dissipation and Residues of Imidacloprid and Its Efficacy against Whitefly, Bemisia tabaci, in Tomato Plants under Field Conditions. Molecules 2022; 27:7607. [PMID: 36364434 PMCID: PMC9659103 DOI: 10.3390/molecules27217607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/22/2022] [Accepted: 11/02/2022] [Indexed: 09/14/2023] Open
Abstract
The whitefly, Bemisia tabaci, is the main pest for many field and horticultural crops, causing main and significant problems. The efficiency of imidacloprid insecticide as seed treatment and foliar spray at three rates against the whitefly, B. tabaci, was evaluated in tomato plants under field conditions; in addition, insecticide residues were determined in tomato leaves and fruits. The obtained results revealed that the seedlings produced from treated seeds with imidacloprid were the most effective treatment in decreasing whitefly stages. Reduction percentages of whitefly stages in seedlings produced from treated seeds and sprayed with ½, ¾ and 1 field rates of imidacloprid were more than that produced from untreated seeds. Tomato fruit yield in seedlings produced from treated seeds and sprayed with one recommended rate of imidacloprid was more than that of untreated seeds. The residues of imidacloprid in leaves and fruits in seedlings produced from treated seeds and sprayed with field rate were more than that of untreated seeds; additionally, the residues were higher in leaves than in fruits. The residual level in fruits was less than the maximum residual level (MRL = 1 mg kg-1) of the Codex Alimentarius Commission. The half-life (t ½) was 6.99 and 6.48 days for leaves and fruits of seedlings produced from treated seeds and 5.59 and 4.59 days for untreated seeds. Residues in tomato fruits were less than the MRL, therefore, imidacloprid is considered an unconventional insecticide appropriate for B. tabaci control that could be safe for the environment.
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Affiliation(s)
- Manal A. A. Abdel razik
- Pesticides Department, Faculty of Agriculture, Menoufia University, Shebin El-Kom P.O. Box 32514, Egypt
| | - Zamzam M. Al Dhafar
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Aisha M. Alqahtani
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Mohamed A. Osman
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Mohamed E. Sweelam
- Economic Entomology & Agricultural Zoology Department, Faculty of Agriculture, Menoufia University, Shebin El-Kom P.O. Box 32514, Egypt
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Lv Y, Li J, Yan K, Ding Y, Gao X, Bi R, Zhang H, Pan Y, Shang Q. Functional characterization of ABC transporters mediates multiple neonicotinoid resistance in a field population of Aphis gossypii Glover. Pestic Biochem Physiol 2022; 188:105264. [PMID: 36464369 DOI: 10.1016/j.pestbp.2022.105264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/28/2022] [Accepted: 10/11/2022] [Indexed: 06/17/2023]
Abstract
The ATP-binding cassette (ABC) transporters C and G subfamilies have been reported to be involved in insecticide detoxification, with most studies showing increased gene transcript levels in response to insecticide exposure. Our previous studies have suggested that ABCC and G transporters participate in cyantraniliprole and thiamethoxam resistance of Aphis gossypii. In this study, we focused on the potential roles of the ABCC and G transporters of an A. gossypii field population (SDR) in neonicotinoid detoxification. The results of leaf dip bioassays showed 629.17- and 346.82-fold greater resistance to thiamethoxam and imidacloprid in the SDR strain, respectively, than in the susceptible strain (SS). Verapamil, an ABC inhibitor, was used for synergism bioassays, and the results showed synergistic effects with thiamethoxam, with synergistic ratios (SRs) of 2.07 and 6.68 in the SS and SDR strains, respectively. In addition to thiamethoxam, verapamil increased imidacloprid toxicity by 1.68- and 1.62-fold in the SS and SDR strains respectively. Then, the expression levels of several ABCC and G transporters were analyzed in different treatments. We found that the transcript levels of AgABCG4, AgABCG17, AgABCG26, AgMRP8 and AgMRP12 were higher in the SDR strain than in the SS strain. The mRNA expression of AgABCG4, AgABCG7, AgABCG13, AgABCG17, AgABCG26, AgMRP8 and AgMRP12 in the SDR strain was increased after thiamethoxam and imidacloprid exposure. The results of transgenic Drosophila melanogaster bioassays suggested that overexpression of AgABCG4, AgABCG7, AgABCG13, AgABCG17, AgABCG26, AgMRP8 and AgMRP12 in transgenic flies was sufficient to confer thiamethoxam and imidacloprid resistance, and AgABCG4, AgABCG7, AgABCG13, AgABCG26 and AgMRP12 may be related to α-cypermethrin cross-resistance with weak effects. In addition, the knockdown of AgABCG4, AgABCG13, AgABCG26, AgMRP8 and AgMRP12, and the knockdown of AgABCG7 and AgABCG26 increased thiamethoxam and imidacloprid mortality in the SDR strain, respectively. Our results suggest that changes in the expression levels of ABCC and G transporters may contribute to neonicotinoid detoxification in the SDR strain, and provide a foundation for clarify the potential roles of ABCC and G transporters in insecticide resistance.
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Affiliation(s)
- Yuntong Lv
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Jianyi Li
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Kunpeng Yan
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Yaping Ding
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing 100193, PR China
| | - Rui Bi
- College of Plant Science, Jilin Agricultural University, Changchun 130118, PR China
| | - Hang Zhang
- College of Plant Science, Jilin University, Changchun 130062, PR China
| | - Yiou Pan
- College of Plant Science, Jilin University, Changchun 130062, PR China.
| | - Qingli Shang
- College of Plant Science, Jilin University, Changchun 130062, PR China.
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Yuan GR, Chen ML, Peng ML, Lei W, Meng LW, Dou W, Wang JJ. Knockdown of a Nicotinic Acetylcholine Receptor Subunit Gene Bdorβ1 Decreases Susceptibility to Oxa-Bridged trans- instead of cis-Nitromethylene Neonicotinoid Insecticides in Bactrocera dorsalis. J Agric Food Chem 2022; 70:13554-13562. [PMID: 36224100 DOI: 10.1021/acs.jafc.2c04709] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nicotinic acetylcholine receptors (nAChRs) are ligand-gated ion channels that mediate the fast action of acetylcholine in synaptic cholinergic transmissions. Insect nAChRs are the target of several classes of insecticides. Here, the full-length cDNA encoding a nAChR beta1 subunit (Bdorβ1) was identified and characterized from a destructive pest, Bactrocera dorsalis. The amino acid sequence of Bdorβ1 shows high identities to other insect nAChRs β1 subunits. Double injection of dsBdorβ1 reduced the expression of Bdorβ1 and in turn significantly decreased susceptibility to oxa-bridged trans- instead of cis-nitromethylene neonicotinoids. Our results support the involvement of Bdorβ1 in the susceptibility of B. dorsalis to oxa-bridged trans- instead of cis-nitromethylene neonicotinoids and imply that these two classes of neonicotinoids might be acting at different nAChR subtypes.
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Affiliation(s)
- Guo-Rui Yuan
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Meng-Ling Chen
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Meng-Lan Peng
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Wei Lei
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Li-Wei Meng
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Wei Dou
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Jin-Jun Wang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Key Laboratory of Entomology and Pest Control Engineering (Chongqing), College of Plant Protection, Southwest University, Chongqing 400716, China
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Guo W, Yang Y, Zhou X, Ming R, Hu D, Lu P. Insight into the toxic effects, bioconcentration and oxidative stress of acetamiprid on Rana nigromaculata tadpoles. Chemosphere 2022; 305:135380. [PMID: 35724715 DOI: 10.1016/j.chemosphere.2022.135380] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/12/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Pesticide pollution has been identified as a factor in the amphibian population decrease. Acetamiprid is a common neonicotinoid pesticide that poses a risk to amphibians due to its high water solubility and inability to be digested. However, there is little research on acetamiprid's toxicity in amphibians, particularly on its biochemical toxic effects. In this study, we investigated the acute toxicity, bioenrichment-elimination, biochemical parameters and metabolism of acetamiprid in Rana nigromaculata tadpoles. The results indicated that acetamiprid is harmful to Rana nigromaculata tadpoles, with an LC50 = 18.49 mg L-1 of 96 h for acute toxicity. Acetamiprid showed rapid accumulation and low bioconcentration levels in tadpoles, with bioconcentration factors (BCFs) < 1. In the elimination process, the concentration of acetamiprid decreased rapidly, with the elimination half-life t1/2 values < 1 d. Additionally, oxidative stress was observed in tadpoles, with biochemical parameters such as superoxide dismutase (SOD), catalase (CAT) and malondialdehyde (MDA) being significantly altered. Nontargeted metabolomics revealed significant changes in biomolecules such as lipids, organic acids and nucleotides in tadpoles, and these metabolites influence pathways including serine and threonine metabolism, histidine metabolism, linoleic acid metabolism and sphingolipid metabolism. These results indicate that acetamiprid caused toxic effects on Rana nigromaculata tadpoles. Our study provides a better understanding of the fate and risk of acetamiprid in amphibians, as well as guidelines for its rational use.
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Affiliation(s)
- Wang Guo
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Ya Yang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Xia Zhou
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Renyue Ming
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Deyu Hu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China.
| | - Ping Lu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China.
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Hu GL, Lu LY, Li YS, Su X, Dong WY, Zhang BZ, Liu RQ, Shi MW, Wang HL, Chen XL. CYP4CJ6-mediated resistance to two neonicotinoid insecticides in Sitobion miscanthi (Takahashi). Bull Entomol Res 2022; 112:646-655. [PMID: 35172917 DOI: 10.1017/s0007485322000037] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The wheat aphid Sitobion miscanthi (CWA) is an important harmful pest in wheat fields. Insecticide application is the main method to effectively control wheat aphids. However, CWA has developed resistance to some insecticides due to its extensive application, and understanding resistance mechanisms is crucial for the management of CWA. In our study, a new P450 gene, CYP4CJ6, was identified from CWA and showed a positive response to imidacloprid and thiamethoxam. Transcription of CYP4CJ6 was significantly induced by both imidacloprid and thiamethoxam, and overexpression of CYP4CJ6 in the imidacloprid-resistant strain was also observed. The sensitivity of CWA to these two insecticides was increased after the knockdown of CYP4CJ6. These results indicated that CYP4CJ6 could be associated with CWA resistance to imidacloprid and thiamethoxam. Subsequently, the posttranscriptional regulatory mechanism was assessed, and miR-316 was confirmed to participate in the posttranscriptional regulation of CYP4CJ6. These results are crucial for clarifying the roles of P450 in the resistance of CWA to insecticides.
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Affiliation(s)
- Gui-Lei Hu
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Liu-Yang Lu
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Ya-She Li
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Xu Su
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Wen-Yang Dong
- Department of Entomology, China Agricultural University, Beijing 100193, P.R. China
| | - Bai-Zhong Zhang
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Run-Qiang Liu
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Ming-Wang Shi
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Hong-Liang Wang
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
| | - Xi-Ling Chen
- College of Resources and Environment, Henan Engineering Research Center of Biological Pesticide & Fertilizer Development and Synergistic Application, Henan Institute of Science and Technology, Xinxiang 453003, P.R. China
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Liu CH, Chen MY, Cheng J, Chuang TN, Liu HP, Lin WY. Imidacloprid Impairs Glutamatergic Synaptic Plasticity and Desensitizes Mechanosensitive, Nociceptive, and Photogenic Response of Drosophila melanogaster by Mediating Oxidative Stress, Which Could Be Rescued by Osthole. Int J Mol Sci 2022; 23:ijms231710181. [PMID: 36077576 PMCID: PMC9456553 DOI: 10.3390/ijms231710181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/23/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Imidacloprid (IMD) is a widely used neonicotinoid-targeting insect nicotine acetylcholine receptors (nAChRs). However, off-target effects raise environmental concerns, including the IMD’s impairment of the memory of honeybees and rodents. Although the down-regulation of inotropic glutamate receptor (iGluR) was proposed as the cause, whether IMD directly manipulates the activation or inhibition of iGluR is unknown. Using electrophysiological recording on fruit fly neuromuscular junction (NMJ), we found that IMD of 0.125 and 12.5 mg/L did not activate glutamate receptors nor inhibit the glutamate-triggered depolarization of the glutamatergic synapse. However, chronic IMD treatment attenuated short-term facilitation (STF) of NMJ by more than 20%. Moreover, by behavioral assays, we found that IMD desensitized the fruit flies’ response to mechanosensitive, nociceptive, and photogenic stimuli. Finally, the treatment of the antioxidant osthole rescued the chronic IMD-induced phenotypes. We clarified that IMD is neither agonist nor antagonist of glutamate receptors, but chronic treatment with environmental-relevant concentrations impairs glutamatergic plasticity of the NMJ of fruit flies and interferes with the sensory response by mediating oxidative stress.
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Affiliation(s)
- Chuan-Hsiu Liu
- Graduate Institute of Chinese Medicine, China Medical University, Taichung 40402, Taiwan
- School of Chinese Medicine, China Medical University, Taichung 40402, Taiwan
| | - Mei-Ying Chen
- Graduate Institute of Integrated Medicine, China Medical University, Taichung 40402, Taiwan
| | - Jack Cheng
- Graduate Institute of Integrated Medicine, China Medical University, Taichung 40402, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan
| | - Tsai-Ni Chuang
- Graduate Institute of Integrated Medicine, China Medical University, Taichung 40402, Taiwan
| | - Hsin-Ping Liu
- Graduate Institute of Acupuncture Science, China Medical University, Taichung 40402, Taiwan
- Correspondence: (H.-P.L.); (W.-Y.L.)
| | - Wei-Yong Lin
- Graduate Institute of Integrated Medicine, China Medical University, Taichung 40402, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan
- Correspondence: (H.-P.L.); (W.-Y.L.)
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Yang Y, Duan A, Zhang C, Zhang Y, Wang A, Xue C, Wang H, Zhao M, Zhang J. Overexpression of ATP-binding cassette transporters ABCG10, ABCH3 and ABCH4 in Aphis craccivora (Koch) facilitates its tolerance to imidacloprid. Pestic Biochem Physiol 2022; 186:105170. [PMID: 35973758 DOI: 10.1016/j.pestbp.2022.105170] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 06/24/2022] [Accepted: 07/05/2022] [Indexed: 06/15/2023]
Abstract
Aphis craccivora (Koch), a globally pest that causes significant threat to the legumes, has developed different degrees of resistance to a variety of insecticides. The ATP-binding cassette (ABC) transporters comprise a multifunctional transporter protein superfamily which play important roles in the transport and detoxification of xenobiotic compounds in insects. However, whether ABC transporters take part in the tolerance of imidacloprid in A. craccivora is still unknown. In order to investigate the functions of ABC transporters in the imidacloprid tolerance, fifty- eight ABC transporters were identified in the transcriptome and genome of A. craccivora and the toxicity of imidacloprid against A. craccivora was significantly increased after application the inhibitors of verapamil and Ko143. The relative expression levels of ABCG5, ABCG6, ABCG10, ABCH3, ABCH4, ABCH8 and ABCH10 were significantly up-regulated in response to imidacloprid treatment with LC15, LC50 and LC85 concentrations, and the expression patterns of these seven ABC transporters were further analyzed at different developmental stages and in different tissues of A. craccivora by quantitative real-time PCR (RT-qPCR). Furthermore, knockdown of ABCG10, ABCH3 and ABCH4 significantly increased the mortality of A. craccivora to imidacloprid. Our results reveal the key functions of ABC transporters in the tolerance of imidacloprid and provide valuable information regarding the development of improved management strategies in A. craccivora.
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Affiliation(s)
- Yuanxue Yang
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Ailing Duan
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Cong Zhang
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Yun Zhang
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Aiyu Wang
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Chao Xue
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Hongyan Wang
- Department of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
| | - Ming Zhao
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Jianhua Zhang
- Institute of Industrial Crops, Shandong Academy of Agricultural Sciences, Jinan 250100, China,.
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Samal RR, Panmei K, Lanbiliu P, Kumar S. Reversion of CYP450 monooxygenase-mediated acetamiprid larval resistance in dengue fever mosquito, Aedes aegypti L. Bull Entomol Res 2022; 112:557-566. [PMID: 35199631 DOI: 10.1017/s0007485321001140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Aedes-borne diseases are on the rampant rise despite continued application of chemical insecticide-based interventions. The appearance of high degree of insecticide resistance in Aedes species and noxious effects on environment and non-targets have raised further concerns. Among new chemical interventions, neonicotinoids are considered a safe and effective approach. The present study investigated the control potency of acetamiprid and development of resistance in Aedes aegypti larvae; and the involvement of CYP450 monooxygenases in inducing resistance. The early fourth instars of Ae. aegypti parent susceptible strain (PS) were selected with acetamiprid for 15 generations (ACSF strain) increasing the resistance to 19.74-fold in ACSF-10 and 36.71-fold in ACSF-15. The ACSF-10 larvae were assayed with acetamiprid combined with piperonyl butoxide (PBO) in three different ratios (1:1, 1:5 and 1:10) and selected for next five generations with 1:10 combination. Selection with synergized acetamiprid (APSF strains) reversed as well as reduced the rate of resistance development resulting in only 1.35-fold resistance in APSF-15. The APSF strains showed %monooxygenase dependency ranging from 86.71 to 96.72%. The estimation of the monooxygenases levels in parent and selected larvae showed increased monooxygenase level in the ACSF strains by 2.42-2.87-fold. The APSF-15 strains exhibited 57.95% lower enzyme production than ACSF-15 strain. The reduction and reversion of resistance by using PBO and the elevated levels of monooxygenases in ACSF and reduction in APSF strains recommend the involvement of CYP450-mediated mechanism in the development of acetamiprid resistance in Ae. aegypti. These studies could help in devising resistance management strategies in order to preserve the efficiency of pre-existing insecticides.
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Affiliation(s)
- Roopa Rani Samal
- Department of Zoology, Acharya Narendra Dev College, University of Delhi, Kalkaji, New Delhi 110019, India
| | - Kungreilu Panmei
- Department of Zoology, Acharya Narendra Dev College, University of Delhi, Kalkaji, New Delhi 110019, India
| | - P Lanbiliu
- Department of Zoology, Acharya Narendra Dev College, University of Delhi, Kalkaji, New Delhi 110019, India
| | - Sarita Kumar
- Department of Zoology, Acharya Narendra Dev College, University of Delhi, Kalkaji, New Delhi 110019, India
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