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Chen XD, George J, Diepenbrock LM, Gossett H, Liu G, Qureshi JA, Stelinski LL. Feeding behavior and hormoligosis associated with imidacloprid resistance in Asian citrus psyllid, Diaphorina citri. INSECT SCIENCE 2024; 31:1211-1221. [PMID: 37969015 DOI: 10.1111/1744-7917.13293] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/13/2023] [Accepted: 10/10/2023] [Indexed: 11/17/2023]
Abstract
Imidacloprid is a neonicotinoid insecticide used for managing the Asian citrus psyllid, Diaphorina citri Kuwayama, which serves as vector of phytopathogens causing citrus greening. However, development of resistance to neonicotinoids among populations of D. citri has coincided with occasional control failures in the field. The objectives of this research were to (1) survey current levels of imidacloprid resistance in Florida citrus; (2) compare feeding behavior between imidacloprid-resistant and susceptible D. citri using electrical penetration graph recordings, and (3) investigate the possible amplification of insecticide hormoligosis associated with resistance. Field surveys confirmed that the susceptibility of D. citri populations to imidacloprid has decreased in commercial Florida citrus groves compared with a laboratory-susceptible population. Following 12 generations of selection, resistance to imidacloprid increased by 438 fold compared with the susceptible strain. Imidacloprid-susceptible D. citri feeding on citrus exhibited significantly more bouts associated with intercellular pathway (C), phloem penetration (D), phloem salivation (E1), and nonprobing (Np) activities than imidacloprid-resistant counterparts. However, there were no differences observed in the frequency or duration of phloem ingestion or xylem feeding between susceptible and resistant D. citri. There was no statistical difference in fecundity between resistant and susceptible strains. However, the fecundity of imidacloprid-susceptible female D. citri treated with a sublethal concentration of imidacloprid (LC25) increased significantly compared with controls, while such hormoligosis was less pronounced among imidacloprid-resistant psyllids. Our results suggest that imidacloprid-resistant psyllids may cease feeding sooner than susceptible counterparts following sublethal exposure to this insecticide, indicative of a behavioral resistance mechanism.
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Affiliation(s)
- Xue Dong Chen
- Entomology and Nematology Department, University of Florida, Citrus Research and Education Center, Lake Alfred, Florida, USA
- Entomology and Nematology Department, University of Florida, Southwest Florida Research and Education Center, Immokalee, Florida, USA
| | - Justin George
- Southern Insect Management Research Unit, USDA-ARS, Stoneville, Mississippi, USA
| | - Lauren M Diepenbrock
- Entomology and Nematology Department, University of Florida, Citrus Research and Education Center, Lake Alfred, Florida, USA
| | - Hunter Gossett
- Entomology and Nematology Department, University of Florida, Citrus Research and Education Center, Lake Alfred, Florida, USA
| | - Guoping Liu
- Entomology and Nematology Department, University of Florida, Citrus Research and Education Center, Lake Alfred, Florida, USA
| | - Jawwad A Qureshi
- Entomology and Nematology Department, University of Florida, Southwest Florida Research and Education Center, Immokalee, Florida, USA
| | - Lukasz L Stelinski
- Entomology and Nematology Department, University of Florida, Citrus Research and Education Center, Lake Alfred, Florida, USA
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Syme T, N'dombidjé B, Odjo A, Gbegbo M, Todjinou D, Ngufor C. Laboratory evaluation of the contact irritancy of a clothianidin solo formulation vs. clothianidin-deltamethrin mixture formulations for indoor residual spraying against pyrethroid-resistant Anopheles gambiae sensu lato. Parasit Vectors 2024; 17:183. [PMID: 38600549 PMCID: PMC11005223 DOI: 10.1186/s13071-024-06265-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 03/27/2024] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND Clothianidin-based indoor residual spraying (IRS) formulations have become available for malaria control as either solo formulations of clothianidin or a mixture of clothianidin with the pyrethroid deltamethrin. While both formulations have been successfully used for malaria control, studies investigating the effect of the pyrethroid in IRS mixtures may help improve our understanding for development of future IRS products. It has been speculated that the irritant effect of the pyrethroid in the mixture formulation may result in shorter mosquito contact times with the treated walls potentially leading to a lower impact. METHODS We compared contact irritancy expressed as the number of mosquito take-offs from cement surfaces treated with an IRS formulation containing clothianidin alone (SumiShield® 50WG) to clothianidin-deltamethrin mixture IRS formulations against pyrethroid-resistant Anopheles gambiae sensu lato under controlled laboratory conditions using a modified version of the World Health Organisation cone bioassay. To control for the pyrethroid, comparison was made with a deltamethrin-only formulation. Both commercial and generic non-commercial mixture formulations of clothianidin and deltamethrin were tested. RESULTS The clothianidin solo formulation did not show significant contact irritancy relative to the untreated control (3.5 take-offs vs. 3.1 take-offs, p = 0.614) while all deltamethrin-containing IRS induced significant irritant effects. The number of take-offs compared to the clothianidin solo formulation (3.5) was significantly higher with the commercial clothianidin-deltamethrin mixture (6.1, p = 0.001), generic clothianidin-deltamethrin mixture (7.0, p < 0.001), and deltamethrin-only (8.2, p < 0.001) formulations. The commercial clothianidin-deltamethrin mixture induced similar contact irritancy as the generic clothianidin-deltamethrin mixture (6.1 take-offs vs. 7.0 take-offs, p = 0.263) and deltamethrin-only IRS (6.1 take-offs vs. 8.2, p = 0.071), showing that the irritant effect in the mixture was attributable to its deltamethrin component. CONCLUSIONS This study provides evidence that the enhanced contact irritancy of the pyrethroid in clothianidin-deltamethrin IRS mixtures can shorten mosquito contact times with treated walls compared to the clothianidin solo formulation. Further trials are needed to directly compare the efficacy of these formulation types under field conditions and establish the impact of this enhanced contact irritancy on the performance of IRS mixture formulations containing pyrethroids.
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Affiliation(s)
- Thomas Syme
- London School of Hygiene and Tropical Medicine, London, UK.
- Centre de Recherche Entomologique de Cotonou, Cotonou, Benin.
- Pan African Malaria Vector Research Consortium (PAMVERC), Cotonou, Benin.
| | - Boris N'dombidjé
- Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Pan African Malaria Vector Research Consortium (PAMVERC), Cotonou, Benin
| | - Aicha Odjo
- Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Pan African Malaria Vector Research Consortium (PAMVERC), Cotonou, Benin
| | - Martial Gbegbo
- Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Pan African Malaria Vector Research Consortium (PAMVERC), Cotonou, Benin
| | - Damien Todjinou
- Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Pan African Malaria Vector Research Consortium (PAMVERC), Cotonou, Benin
| | - Corine Ngufor
- London School of Hygiene and Tropical Medicine, London, UK.
- Centre de Recherche Entomologique de Cotonou, Cotonou, Benin.
- Pan African Malaria Vector Research Consortium (PAMVERC), Cotonou, Benin.
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Eduardo WI, Miranda MP, Volpe HXL, Garcia RB, Girardi EA, Alquezar B, Ruiz AE, Peña L. Resistance of True Citrus species to Diaphorina citri. PEST MANAGEMENT SCIENCE 2022; 78:4783-4792. [PMID: 35900363 DOI: 10.1002/ps.7098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/30/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Host genetic resistance is a promising strategy for the management of Diaphorina citri Kuwayama (Hemiptera: Psyllidae), and consequently Huanglongbing (HLB). To date, no study has investigated the resistance to D. citri in the clonal and vegetatively propagated plants of the Microcitrus, Eremocitrus, and Atalantia genera. This study assesses Near and True Citrus genotype antixenosis and antibiosis against D. citri, with trichome density and volatile emission as possible mechanisms of resistance. RESULTS All genotypes were oviposited by D. citri, however, 8 of 14 genotypes were less oviposited than Citrus × sinensis 'Valencia' (susceptible control). Diaphorina citri nymphs had lower nymphal viability in E. glauca (31%) and M. warburgiana (58%) than that in Citrus × sinensis (77%). The behavioral assay showed that 30% of D. citri nymphs in the last instars evaded E. glauca shoots, whereas no nymphs evaded Citrus × sinensis shoots. A higher trichome density was observed in E. glauca shoots compared to the other genotypes. Chemical analysis revealed differences in the volatile profiles of E. glauca and Citrus × sinensis. CONCLUSION Eremocitrus glauca and M. warburgiana genotypes were more resistant to D. citri than Citrus × sinensis. Higher trichome density in the shoots may negatively influence the development of D. citri nymphs. Eremocitrus glauca volatiles may also be involved in their resistance to D. citri. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Wellington Ivo Eduardo
- Department of Research and Development, Fund for Citrus Protection - Fundecitrus, Araraquara, Brazil
| | - Marcelo Pedreira Miranda
- Department of Research and Development, Fund for Citrus Protection - Fundecitrus, Araraquara, Brazil
| | | | - Rafael Brandão Garcia
- Department of Research and Development, Fund for Citrus Protection - Fundecitrus, Araraquara, Brazil
| | - Eduardo Augusto Girardi
- Department of Research and Development, Fund for Citrus Protection - Fundecitrus, Araraquara, Brazil
- Brazilian Agricultural Research Corporation - Embrapa, Embrapa Cassava & Fruits, Cruz das Almas, Brazil
| | - Berta Alquezar
- Instituto de Biologia Molecular y Celular de Plantas - Consejo Superior de Investigaciones Científicas (IBMCP-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - Ana Espinosa Ruiz
- Instituto de Biologia Molecular y Celular de Plantas - Consejo Superior de Investigaciones Científicas (IBMCP-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - Leandro Peña
- Instituto de Biologia Molecular y Celular de Plantas - Consejo Superior de Investigaciones Científicas (IBMCP-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
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Chen XD, Stockton D, Gossett H, Qureshi JA, Ibanez F, Pelz-Stelinski KS, Stelinski LL. Comparisons of economic thresholds for Asian citrus psyllid management suggest a revised approach to reduce management costs and improve yield. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.948278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Huanglongbing (HLB) or citrus greening disease is transmitted by the Asian citrus psyllid, Diaphorina citri Kuwayama. Vector control is considered a basic component of HLB management even under high disease incidence scenarios. While vector management heavily relies on the application of synthetic chemical sprays, overuse of insecticides raises several concerns including insecticide resistance, environmental impacts, and secondary pest outbreaks. The present study aims to compare the effects of three different economic thresholds (ET-0.2, 0.5, 1.0) and one calendar-based application schedule on the incidence of D. citri and beneficial species in plots of commercially grown citrus, as well as end-of-season yield and overall management costs. The results suggest that reducing spray frequency from eight to as few as three sprays per year had little effect on counts of pest and beneficial insects in the field. The numbers of D. citri and that of a secondary weevil pest were similar between plots treated with the calendar-based spray plots and plots managed with the ET-1.0. Furthermore, spider numbers were higher in the ET-1.0 plots, while ant numbers were lower compared with calendar sprayed plots. Management input costs were lower under economic thresholds (ET-0.5–ET-1.0) than with monthly calendar-based sprays, while yield losses were only slightly greater in the lower threshold of 0.2 mean psyllids per tap than with calendar sprays. Overall, management savings of more than 100% made up for this difference. Together, these results suggest that implementing a spray program of rotated chemistries based on an economic threshold of 0.5–1.0 adult psyllids per stem tap could provide both economic and ecological benefits. We discuss the implications of such an approach in the context of a young citrus tree protection program and the greater goals of sustainable citrus production under HLB.
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Su Y, Ren X, Ma X, Wang D, Hu H, Song X, Cui J, Ma Y, Yao Y. Evaluation of the Toxicity and Sublethal Effects of Acetamiprid and Dinotefuran on the Predator Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae). TOXICS 2022; 10:toxics10060309. [PMID: 35736917 PMCID: PMC9228657 DOI: 10.3390/toxics10060309] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 01/27/2023]
Abstract
Neonicotinoid insecticides affect the physiology or behavior of insects, posing risks to non-target organisms. In this study, the effects of sublethal doses of two neonicotinoid insecticides, acetamiprid and dinotefuran, against Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae) were determined and compared. The results showed that acetamiprid and dinotefuran at LD10 (8.18 ng a.i. per insect and 9.36 ng a.i. per insect, respectively) and LD30 (16.84 ng a.i. per insect and 15.01 ng a.i. per insect, respectively) significantly prolonged the larval stages and pupal stages (except acetamiprid LD10), compared to control. In addition, acetamiprid and dinotefuran at LD30 significantly prolonged the adult preoviposition period (APOP) and total preoviposition period (TPOP). In contrast, the two insecticides at LD10 and LD30 had no significant effect on the longevity, fecundity, reproductive days, preadult survival rate (%), intrinsic rate of increase (r), net reproductive rate (R0), and finite rate of increase (λ). These results provide a theoretical basis for the rational use of these two insecticides and the utilization and protection of C. pallens.
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Affiliation(s)
- Yue Su
- Key Laboratory of Production and Construction Corps of Agricultural Integrated Pest Management in Southern Xinjiang, College of Agriculture, Tarim University, Aral 843300, China;
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
| | - Xiangliang Ren
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaoyan Ma
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou 450001, China
| | - Dan Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
| | - Hongyan Hu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
| | - Xianpeng Song
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
| | - Jinjie Cui
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou 450001, China
| | - Yan Ma
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (X.R.); (X.M.); (D.W.); (H.H.); (X.S.); (J.C.)
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou 450001, China
- Correspondence: (Y.M.); (Y.Y.)
| | - Yongsheng Yao
- Key Laboratory of Production and Construction Corps of Agricultural Integrated Pest Management in Southern Xinjiang, College of Agriculture, Tarim University, Aral 843300, China;
- Correspondence: (Y.M.); (Y.Y.)
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Shen GM, Ou SY, Li CZ, Feng KY, Niu JZ, Adang MJ, He L. Transcription factors CncC and Maf connect the molecular network between pesticide resistance and resurgence of pest mites. INSECT SCIENCE 2022; 29:801-816. [PMID: 34586709 DOI: 10.1111/1744-7917.12970] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 08/30/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
Pesticide resistance and resurgence are serious problems often occurring simultaneously in the field. In our long-term study of a fenpropathrin-resistant strain of Tetranychus cinnabaribus, enhancement of detoxification and modified fecundity mechanisms were both observed. Here we investigate the network across these two mechanisms and find a key node between resistance and resurgence. We show that the ecdysone pathway is involved in regulating the fecundity of T. cinnabaribus. The concentration change of ecdysone is consistent with the fecundity curve; the concentration of ecdysone is higher in the fenpropathrin-resistant strain which has stronger fecundity. The enhancement of ecdysone is due to overexpression of two P450 genes (CYP314A1 and CYP315A1) in the ecdysone synthesis pathway. Silencing expression of these CYP genes resulted in lower concentration of ecdysone, reduced expression of vitellogenin, and reduced fecundity of T. cinnabaribus. The expression of CYP315A1 is regulated by transcription factors Cap-n-collar isoform C (CncC) and Musculoaponeurotic fibrosarcoma protein (Maf), which are involved in regulating other P450 genes functioning in detoxification of fenpropathrin in T. cinnabaribus. A similar regulation is established in citrus pest mite Panonychus citri showing that the CncC pathway regulates expression of PcCYP315A1, which affects mite fecundity. Transcription factors are activated to upregulate detoxification genes facilitating pesticide resistance, while the "one to multiple" regulation mode of transcription factors simultaneously increases expression of metabolic enzyme genes in hormone pathways and alters the physiology of pests. This is an important response of arthropods to pesticides which leads to resistance and population resurgence.
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Affiliation(s)
- Guang-Mao Shen
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
- State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Southwest University, Chongqing, China
| | - Shi-Yuan Ou
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
- State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Southwest University, Chongqing, China
| | - Chuan-Zhen Li
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
- State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Southwest University, Chongqing, China
| | - Kai-Yang Feng
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
- State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Southwest University, Chongqing, China
| | - Jin-Zhi Niu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
- State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Southwest University, Chongqing, China
| | - Michael J Adang
- Department of Entomology, University of Georgia, Athens, Georgia, USA
| | - Lin He
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, Southwest University, Chongqing, China
- State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University, Southwest University, Chongqing, China
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Joseph SV. Insect growth regulators elicit transovarial effects on Teleonemia scrupulosa (Hemiptera: Tingidae). PEST MANAGEMENT SCIENCE 2022; 78:1800-1805. [PMID: 35019229 DOI: 10.1002/ps.6797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/04/2022] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Lantana lace bug, Teleonemia scrupulosa Stål (Hemiptera: Tingidae), is an important insect pest of lantana (Lantana camara L.). The adults and nymphs feed on the leaves, gradually deteriorating the quality of leaf tissue, as the affected leaves appear brown and desiccated. Infestations of T. scrupulosa reduce the market value of container plants in nurseries and the aesthetic value of ornamental landscapes. Because T. scrupulosa typically is managed using neonicotinoids and concerns related to the nontargeted effects of neonicotinoids on pollinators are mounting, practitioners are seeking alternative options to manage T. scrupulosa infestations. Insect growth regulators (IGRs) elicit transovarial activity, where adults exposed to IGRs produce nonviable eggs, but this effect has not been documented for T. scrupulosa. RESULTS A significantly lower number of T. scrupulosa nymphs was produced when adults were sprayed topically with novaluron and pyriproxyfen than nontreated adults. The number of T. scrupulosa nymphs produced was not significantly different when adults were exposed to a lower dose (0.125×) and a maximum dose (1.0×) of novaluron. CONCLUSION Novaluron and pyriproxyfen elicited transovarial effects on T. scrupulosa when adults were exposed to these IGRs. Evidence of transovarial effects was demonstrated when T. scrupulosa adults were exposed to lower doses (≤0.125×) than the maximum label dose, as densities of nymphs were similar between the lower doses and the maximum label dose of novaluron.
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Affiliation(s)
- Shimat V Joseph
- Department of Entomology, University of Georgia, Griffin, GA, USA
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Della Vechia JF, Zanardi OZ, Kapp ABP, Bassanezi RB, de Andrade DJ. Lethal and sublethal effects of insecticides on the survival and reproduction of Brevipalpus yothersi (Acari: Tenuipalpidae). EXPERIMENTAL & APPLIED ACAROLOGY 2021; 85:191-204. [PMID: 34739615 DOI: 10.1007/s10493-021-00672-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 10/29/2021] [Indexed: 06/13/2023]
Abstract
The overuse of insecticides to control vector insects such as Diaphorina citri Kuwayama in citrus groves has altered the population dynamics of pest mites. Among phytophagous mites, population outbreaks of citrus leprosis mite, Brevipalpus yothersi Baker, have been increasingly intense and frequent in Brazilian citrus groves. Despite the great importance of the B. yothersi mite for citrus production, the lethal and sublethal effects of insecticides on this mite have not yet been studied. Therefore, in this study, the effects of insecticides commonly used for D. citri control on B. yothersi mortality, reproduction, and instantaneous growth rate were assessed. For this, two experiments were carried out, one under controlled conditions and another in a greenhouse. The insecticides tested were beta-cyfluthrin, bifenthrin, buprofezin, chlorpyrifos, dimethoate, pyriproxyfen, and thiamethoxam at 0 (control), 0.0625, 0.125, 0.25, 0.5, 1, and twofold the recommended insecticide concentration for D. citri control. The pyriproxyfen insecticide provided high mortality of B. yothersi even at low concentrations. Furthermore, this insecticide negatively interfered with the reproduction of this mite. Beta-cyfluthrin, bifenthrin, buprofezin, chlorpyrifos, dimethoate, and thiamethoxam, in the tested concentrations, showed low impact on citrus leprosis mite. Regarding the reproduction of the mite, no significant increase in fecundity was observed on B. yothersi females exposed to insecticide residues, regardless of the concentration tested. Therefore, the application of these insecticides in the management of pest insects is unlikely to promote an increase in the citrus leprosis mite population.
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Affiliation(s)
- Jaqueline Franciosi Della Vechia
- Department of Agricultural Sciences, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP/FCAV), Via de Acesso Prof. Paulo Donato Castellane, S/N, Vila Industrial, Jaboticabal, São Paulo, 14884-900, Brazil.
| | - Odimar Zanuzo Zanardi
- Department of Education, Research and Extension, Federal Institute of Santa Catarina (IFSC), São Miguel do Oeste, Santa Catarina, 89900-000, Brazil
| | - Ana Beatriz Piai Kapp
- Department of Agricultural Sciences, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP/FCAV), Via de Acesso Prof. Paulo Donato Castellane, S/N, Vila Industrial, Jaboticabal, São Paulo, 14884-900, Brazil
| | | | - Daniel Júnior de Andrade
- Department of Agricultural Sciences, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP/FCAV), Via de Acesso Prof. Paulo Donato Castellane, S/N, Vila Industrial, Jaboticabal, São Paulo, 14884-900, Brazil
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Volpe HXL, Zanardi OZ, Magnani RF, Luvizotto RAG, Esperança V, de Freitas R, Delfino JY, Mulinari TA, de Carvalho RI, Wulff NA, de Miranda MP, Peña L. Behavioral responses of Diaphorina citri to host plant volatiles in multiple-choice olfactometers are affected in interpretable ways by effects of background colors and airflows. PLoS One 2020; 15:e0235630. [PMID: 32628739 PMCID: PMC7337303 DOI: 10.1371/journal.pone.0235630] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/18/2020] [Indexed: 12/15/2022] Open
Abstract
In several phytophagous hemipterans, behavior appears to be mediated by both visual and chemical cues. For the Asian citrus psyllid (ACP) Diaphorina citri (Hemiptera: Liviidae), olfactometric assays are generally difficult to interpret owing to the low proportion of individuals responding to odors (~30–40%), which compromises the efficiency and reliability of the results of behavioral tests. In the present study, the ACP behavioral response to emitted odors from sweet orange (Citrus sinensis L. Osbeck) flushes in a 4-arm olfactometer using different colors (four white-, two white- and two yellow- on opposite sides, or four yellow-colored fields), and the role of the airflow in the concentration of volatile organic compounds (VOCs) were assessed at two airflows [0.4 and 0.1 L/min (LPM)]. Exposure to ‘Pera’ sweet orange or clean air in treatments with four yellow-colored-fields increased the response rate of ACP females to the odor sources compared with exposure to ‘Pera’ sweet orange or clean air in treatments with four white-colored-fields, independently of the odor source and airflow tested. For the assays using two white- and two yellow-colored fields on opposite sides and 0.4 or 0.1 LPM airflow, the residence time of ACP females to odors (‘Pera’ sweet orange or clean air) was similar or higher in treatments using yellow- than those using white-colored fields. For both assays (VOCs and olfactometric behavioral parameters), the reduction in airflow from 0.4 to 0.1 LPM greatly changed the airborne concentration and ACP behavior. Quantitative chemical analyses revelead that the concentration of most compounds emitted by ‘Pera’ sweet orange flushes for the headspace using 0.1 LPM airflow were greater than the concentrations measured using 0.4 LPM airflow. Therefore, this treatment design provides an useful tool to assess the ACP behavioral response to the odors from citrus plants, and it can also help in the discrimination of dose-response screenings for VOCs or conspecific insects.
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Affiliation(s)
- Haroldo Xavier Linhares Volpe
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
- * E-mail:
| | - Odimar Zanuzo Zanardi
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Rodrigo Facchini Magnani
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
- Chemistry Department, Federal University of São Carlos, São Paulo, Brazil
| | | | - Victoria Esperança
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Renato de Freitas
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Jennifer Yslaine Delfino
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Tatiana Aparecida Mulinari
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Rômulo Igor de Carvalho
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Nelson Arno Wulff
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Marcelo Pedreira de Miranda
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
| | - Leandro Peña
- Department of Research and Development, Fund for Citrus Protection (Fundecitrus), Araraquara, São Paulo, Brazil
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones, Valencia, Spain
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dos Santos AB, de Albuquerque CMR. Behavioural changes in Tityus stigmurus (Thorell, 1876) (SCORPIONES: BUTHIDAE) exposed to a pyrethroid insecticide. J ETHOL 2020. [DOI: 10.1007/s10164-020-00651-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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