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Silva APN, Carvalho GA, Haddi K. The interplay between temperature and an insecticide mixture modulates the stimulatory response of sublethally exposed Myzus persicae. ECOTOXICOLOGY (LONDON, ENGLAND) 2024:10.1007/s10646-024-02780-w. [PMID: 38990494 DOI: 10.1007/s10646-024-02780-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/01/2024] [Indexed: 07/12/2024]
Abstract
Temperature can interact with chemical pesticides and modulate their toxicity. Sublethal exposure to pesticides is known to trigger hormetic responses in pests. However, the simultaneous effects of temperature and sublethal exposure to single or mixture-based insecticides on the insects' stimulatory responses are not frequently considered in toxicological studies. Here we investigated the combined effects of temperature on the lethal and sublethal responses of the green peach aphid Myzus persicae after exposure to commercial formulations of a neonicotinoid (thiamethoxam) and a pyrethroid (lambda-cyhalothrin) and their mixture. Firstly, the concentration-response curves of the insecticides were determined under four temperatures (15 °C, 20 °C, 25 °C, and 28 °C) by the leaf dipping method. Subsequently, the sublethal concentrations C0, CL1, CL5, CL10, CL15, CL20, and CL30 were selected to assess sublethal effects on aphids' longevity and reproduction under the same temperatures. The results showed that the mixture of thiamethoxam + lambda-cyhalothrin caused greater toxicity to aphids compared to the formulations with each active ingredient alone and that the toxicity was higher at elevated temperatures. Furthermore, the exposure to low concentrations of the mixture (thiamethoxam + lambda-cyhalothrin) and the separated insecticides induced stimulatory responses in the longevity and fecundity of exposed aphid females, but the occurrence of such hormetic responses depended on the insecticide type, its sublethal concentration, and the temperature as well as their interactions.
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Affiliation(s)
- Ana Paula Nascimento Silva
- Laboratory of Molecular Entomology and Ecotoxicology, Department of Entomology, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil
| | - Geraldo Andrade Carvalho
- Laboratory of Ecotoxicology and Integrated Pest Management, Department of Entomology, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil
| | - Khalid Haddi
- Laboratory of Molecular Entomology and Ecotoxicology, Department of Entomology, Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil.
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2
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Hu K, Jia H, Fu B, Li Y, Liu F. Mating behavior and responses to sublethal concentrations of imidacloprid in the predator Cyrtorhinus lividipennis. PEST MANAGEMENT SCIENCE 2024; 80:3451-3458. [PMID: 38415819 DOI: 10.1002/ps.8050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 01/26/2024] [Accepted: 02/28/2024] [Indexed: 02/29/2024]
Abstract
BACKGROUND Mating is an essential factor that governs the size of insect populations that reproduce sexually. The extensive application of insecticides has both lethal and sublethal effects on the physiology and mating behavior of insect natural enemies. The predatory bug Cyrtorhinus lividipennis is a natural enemy of planthopper and leafhopper populations in the rice ecosystem. Unfortunately, the effects of insecticides on the mating behavior of C. lividipennis are not well-understood. RESULTS The mating behavior of C. livdipennis consisted of mounting, antennal touch and mating attempts, genital insertion, adjustment of posture, and separation of the mating pair. Approximately 82.5% of the C. lividipennis mating pairs displayed their first mating at 12-36 h postemergence. Mating activity occurred throughout a 24-h period, with peak activity at 12:00-14:00 h, and the mean duration of mating was 48.75 min. Sublethal exposure to imidacloprid increased mating latency. Compared with the controls, the duration of courtship, pre-mating and adjusting posture for males treated with imidacloprid were prolonged. The duration of mating for females treated with imidacloprid was prolonged relative to untreated controls. The fecundity and daily spawning capacity of females treated with imidacloprid were higher than the untreated controls. CONCLUSION Our results provide insight into the mating process of C. lividipennis. Imidacloprid prolonged the duration of mating, which may explain the enhanced reproductive output in C. lividipennis females treated with imidacloprid. These findings will be useful in both rearing C. lividipennis and deploying this natural enemy in rice fields. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Kui Hu
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Husheng Jia
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Baobao Fu
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Yao Li
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Fang Liu
- College of Plant Protection, Yangzhou University, Yangzhou, China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture & Agri-Product Safety, Yangzhou University, Yangzhou, China
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Henriques Martins CA, Azpiazu C, Bosch J, Burgio G, Dindo ML, Francati S, Sommaggio D, Sgolastra F. Different Sensitivity of Flower-Visiting Diptera to a Neonicotinoid Insecticide: Expanding the Base for a Multiple-Species Risk Assessment Approach. INSECTS 2024; 15:317. [PMID: 38786873 PMCID: PMC11122312 DOI: 10.3390/insects15050317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024]
Abstract
Insects play an essential role as pollinators of wild flowers and crops. At the same time, pollinators in agricultural environments are commonly exposed to pesticides, compromising their survival and the provision of pollination services. Although pollinators include a wide range of species from several insect orders, information on pesticide sensitivity is mostly restricted to bees. In addition, the disparity of methodological procedures used for different insect groups hinders the comparison of toxicity data between bees and other pollinators. Dipterans are a highly diverse insect order that includes some important pollinators. Therefore, in this study, we assessed the sensitivity of two hoverflies (Sphaerophoria rueppellii, Eristalinus aeneus) and one tachinid fly (Exorista larvarum) to a neonicotinoid insecticide (Confidor®, imidacloprid) following a comparative approach. We adapted the standardized methodology of acute contact exposure in honey bees to build dose-response curves and calculate median lethal doses (LD50) for the three species. The methodology consisted in applying 1 µL of the test solution on the thorax of each insect. Sphaerophoria rueppelli was the most sensitive species (LD50 = 10.23 ng/insect), and E. aeneus (LD50 = 18,176 ng/insect) the least. We then compared our results with those available in the literature for other pollinator species using species sensitivity distribution (SSD). Based on the SSD curve, the 95th percentile of pollinator species would be protected by a safety factor of 100 times the Apis mellifera endpoint. Overall, dipterans were less sensitive to imidacloprid than most bee species. As opposed to most bee species, oviposition and fecundity of many dipteran species can be reliably assessed in the laboratory. We measured the number of eggs laid following exposure to different insecticide doses and assessed the potential trade-off between oviposition and survival through the sublethal sensitivity index (SSI). Exposure to imidacloprid had a significant effect on fecundity, and SSI values indicated that oviposition is a sensitive endpoint for the three dipteran species tested. Future studies should integrate this information related to population dynamics in simulation models for environmental risk assessment.
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Affiliation(s)
- Cátia Ariana Henriques Martins
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum Università di Bologna, 40127 Bologna, Italy; (C.A.H.M.); (G.B.); (M.L.D.); (S.F.)
| | - Celeste Azpiazu
- CREAF, Centre de Recerca Ecològica i Aplicacions Forestals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain; (C.A.); (J.B.)
- Universidad Politécnica de Madrid, 28040 Madrid, Spain
| | - Jordi Bosch
- CREAF, Centre de Recerca Ecològica i Aplicacions Forestals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain; (C.A.); (J.B.)
| | - Giovanni Burgio
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum Università di Bologna, 40127 Bologna, Italy; (C.A.H.M.); (G.B.); (M.L.D.); (S.F.)
| | - Maria Luisa Dindo
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum Università di Bologna, 40127 Bologna, Italy; (C.A.H.M.); (G.B.); (M.L.D.); (S.F.)
| | - Santolo Francati
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum Università di Bologna, 40127 Bologna, Italy; (C.A.H.M.); (G.B.); (M.L.D.); (S.F.)
| | - Daniele Sommaggio
- Dipartimento di Scienze della Vita, Università di Modena e Reggio Emilia, 41121 Modena, Italy;
- National Biodiversity Future Center (NBFC), Piazza Marina 61, 90133 Palermo, Italy
| | - Fabio Sgolastra
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum Università di Bologna, 40127 Bologna, Italy; (C.A.H.M.); (G.B.); (M.L.D.); (S.F.)
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Santos TLB, Baldin ELL, Lima APS, Santana AS, Santos MC, Silveira BRR, Bueno NM, Cabral IR, Soares MCE, Pinheiro AM, Lourenção AL. Intraspecific and interspecific interaction and fitness cost of stink bugs Euschistus heros, Diceraeus melacanthus, and Piezodorus guildinii in soybean. PEST MANAGEMENT SCIENCE 2024; 80:661-668. [PMID: 37752087 DOI: 10.1002/ps.7794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/16/2023] [Accepted: 09/27/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND The most common pentatomid species in soybean crops are Euschistus heros (F.), Piezodorus guildinii (W.), and Diceraeus melacanthus (D.), causing a significant reduction in yield. It is known that these stink bugs inhabit the reproductive structures of soybeans simultaneously; however, there are few studies addressing their intraguild interactions, as well as aspects of possible competition between them in plants. Thus, the interspecific and intraspecific interactions of these stink bugs were evaluated in laboratory and field conditions, throughout the duration of the instars and adulthood, including longevity, mortality, and the number of eggs per female. RESULTS Euschistus heros had a higher competitive capacity in the interaction with D. melacanthus and P. guildinii, negatively interfering in the abundance or development (duration of instar, fertility, and mortality) of these stink bugs in soybean crops. This interference may act on the natural balance of these insect pests. Mortality of adults in interactions containing E. heros as a competitor or not showed that this species was not affected by the other species under field conditions. In the scenario where D. melacanthus was evaluated, it was observed that the presence of other species caused higher mortality in D. melacanthus. Additionally, higher P. guildiniii mortality was observed in interspecific interactions. CONCLUSION Our results suggest that E. heros has a greater competitive ability in the soybean crop, followed by D. melacanthus and P. guildinii. Therefore, the results found justified the greater abundance of E. heros and helped to explain the increasing occurrence of D. melacanthus in soybean crops, contributing to new directions for understanding the interaction of the soybean stink bug complex. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Thais L Braga Santos
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - Edson L Lopes Baldin
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - Ana P Santana Lima
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - Alisson S Santana
- Department of Entomology, University of Nebraska, North Platte, NE, USA
| | - Maria C Santos
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | | | - Nadia M Bueno
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - Isabella R Cabral
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - Muriel C Emanoeli Soares
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - Aline M Pinheiro
- Department of Crop Protection, School of Agriculture, São Paulo State University, Botucatu, Brazil
| | - André L Lourenção
- Department of Entomology and Acarology, College of Agriculture, University of São Paulo, São Paulo, Brazil
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Montaño-Campaz ML, Oliveira EE, Bacca T, Toro-Restrepo B, Dias LG. Sex-specific alterations in adaptive responses of Chironomus columbiensis triggered by imidacloprid chronic and acute sublethal exposures. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27601-1. [PMID: 37253916 DOI: 10.1007/s11356-023-27601-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 05/09/2023] [Indexed: 06/01/2023]
Abstract
The use of imidacloprid is a common pest control practice in the Neotropical region. However, the imidacloprid unintended sublethal effects on Neotropical aquatic non-target arthropods and undesirable consequences for aquatic environments remain unclear. Here, we assessed the susceptibility of Chironomus columbiensis (Diptera: Chironomidae) larvae to the neonicotinoid imidacloprid and evaluated whether sublethal exposure types would trigger sex-dependent adaptive responses (e.g., emergence, body mass, reproduction, wing morphology). We conducted a concentration-mortality curve (96 h of exposure) and established chronic and acute sublethal exposure bioassays. While chronic sublethal exposures consisted of exposing individuals during their entire larval and pupal stages, the acute sublethal exposures represented a single short duration (24 h) exposure episode during either the first or fourth larval instar. Our results revealed that chronic sublethal exposure reduced the body mass of males, while acute sublethal exposures during the first instar resulted in heavier males than those that were not exposed to imidacloprid. Chronic exposure also reduced the reproduction of males and females, while the acute sublethal exposure only affected the reproduction of individuals that were imidacloprid-exposed on their later larval instar. Chronic and acute sublethal exposures did differentially affect the wing properties of C. columbiensis males (e.g., increased size when chronically exposed and highly asymmetric wings when acutely exposed in early larval phase) and females (e.g., highly asymmetric wings when chronically and acutely exposed). Collectively, our findings demonstrated that imidacloprid can cause unintended sublethal effects on C. columbiensis, and those effects are dependent on sex, exposure type, and developmental stage.
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Affiliation(s)
- Milton L Montaño-Campaz
- Programa de Doctorado, Facultad de Ciencias Agropecuarias, Grupo de Investigación Bionat, Universidad de Caldas, Manizales, Colombia
- Programa de Pós-Graduação Em Ecologia, Universidade Federal de Viçosa (UFV), Viçosa-MG, 36570-900, Brazil
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa-MG, 36570-900, Brazil.
| | - Tito Bacca
- Facultad de Ingeniería Agronómica, Universidad del Tolima, Tolima, Colombia
| | - Beatriz Toro-Restrepo
- Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas Y Naturales, Grupo de Investigación Bionat, Universidad de Caldas, Caldas, Colombia
| | - Lucimar G Dias
- Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas Y Naturales, Grupo de Investigación Bionat, Universidad de Caldas, Caldas, Colombia
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Alimirzaee S, Khajehali J, Van Leeuwen T. Hormetic effects of neonicotinoid insecticides on Rhizoglyphus robini (Acari: Acaridae). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 192:105396. [PMID: 37105633 DOI: 10.1016/j.pestbp.2023.105396] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/16/2023] [Accepted: 03/19/2023] [Indexed: 06/19/2023]
Abstract
The stimulation of biological processes by sublethal doses of insecticides or other stressors is known as hormesis. Here, we have evaluated whether exposure to field-relevant or low concentrations of neonicotinoids induce changes in the reproductive capacity of the bulb mite Rhizoglyphus robini (Acari: Acaridae). Among the tested neonicotinoids imidacloprid, thiamethoxam, and dinotefuran, the highest hormetic effect on the reproduction of R. robini occurred 24 h after the 48 h exposure period to imidacloprid at concentrations of 70 and 140 mg a.i./L. Despite the stimulating effects of imidacloprid on mite reproduction, no significant differences were observed in the offspring (F1) for biological aspects including egg hatch rate, embryonic period and sex ratio, while an increase was found in the duration of development time from egg to adult. Evaluation of the detoxification enzyme activities of treated adults showed that the highest activity of carboxyl/cholinesterases, cytochrome P450s, and glutathione S-transferases was obtained when exposed to 70, 140 and 70 mg a.i./L imidacloprid, immediately after the exposure period, respectively. Also, an increase in the activity of the antioxidant enzyme catalase was observed compared to that of the control. After imidacloprid pretreatment (140 mg a.i./L), the tolerance of adult mites to diazinon was increased about two-fold. This study shows that exposure to imidacloprid can induce hormetic effects on R. robini and could severely complicate its control due to a higher reproduction, enhanced detoxification enzyme activities, and increased tolerance against other pesticides.
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Affiliation(s)
- Sara Alimirzaee
- Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Jahangir Khajehali
- Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Thomas Van Leeuwen
- Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000, Ghent, Belgium..
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Ju D, Liu YX, Liu X, Dewer Y, Mota-Sanchez D, Yang XQ. Exposure to lambda-cyhalothrin and abamectin drives sublethal and transgenerational effects on the development and reproduction of Cydia pomonella. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114581. [PMID: 36731179 DOI: 10.1016/j.ecoenv.2023.114581] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
The codling moth Cydia pomonella (Lepidoptera: Tortricidae) is a major invasive pest of pome fruits and walnuts worldwide. Lambda-cyhalothrin (LCT) and abamectin (AM) have been frequently used in C. pomonella control, but control of this pest is very difficult because shortly after hatching, larvae of this insect bore tunnels and hide inside host plant fruit. In this study, a simulated field spray bioassay method was developed against neonate larvae of C. pomonella and concentration-response bioassays were conducted to evaluate the susceptibility of the neonate larvae to LCT and AM. Exposure of neonate larvae to sublethal concentration (LC30) of LCT or AM significantly reduced the survival rate of larvae (4th and 5th instars), lowered the mean weight of larvae and pupae, and decreased the daily maximal number of eggs laid and the total number of eggs laid (fecundity) per female. The sublethal effects, including reduced body mass, mean fecundity and net reproductive rate, extended mean generation time, and shortened oviposition period, were also found in transgenerational offspring. Furthermore, the transgenerational maternal effects were more obvious for AM than LCT, in comparison to the control. Additionally, the estimated population size was decreased by exposure to LC30 of LCT and AM, and the observed reduction of fecundity and population size within and across generations was likely the result of the downregulation of the reproduction-related vitellogenin gene (CpVg) after exposure to LC30 of LCT and AM. These results provide a better understanding of the overall effects of LCT and AM on C. pomonella and the transgenerational effects which should be taken into consideration when using insecticides in order to control C. pomonella.
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Affiliation(s)
- Di Ju
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China; Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang 110866, Liaoning, China
| | - Yu-Xi Liu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China; Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang 110866, Liaoning, China
| | - Xue Liu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China; Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang 110866, Liaoning, China
| | - Youssef Dewer
- Phytotoxicity Research Department, Central Agricultural Pesticide Laboratory, Agricultural Research Center, Dokki, 12618 Giza, Egypt
| | - David Mota-Sanchez
- Department of Entomology, Michigan State University, East Lansing, MI 48824, United States
| | - Xue-Qing Yang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China; Key Laboratory of Economical and Applied Entomology of Liaoning Province, Shenyang 110866, Liaoning, China.
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Mogilicherla K, Roy A. Epigenetic regulations as drivers of insecticide resistance and resilience to climate change in arthropod pests. Front Genet 2023; 13:1044980. [PMID: 36685945 PMCID: PMC9853188 DOI: 10.3389/fgene.2022.1044980] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/19/2022] [Indexed: 01/09/2023] Open
Abstract
Arthropod pests are remarkably capable of rapidly adapting to novel forms of environmental stress, including insecticides and climate change. The dynamic interplay between epigenetics and genetics explains the largely unexplored reality underlying rapid climatic adaptation and the development of insecticide resistance in insects. Epigenetic regulation modulates gene expression by methylating DNA and acetylating histones that play an essential role in governing insecticide resistance and adaptation to climate change. This review summarises and discusses the significance of recent advances in epigenetic regulation that facilitate phenotypic plasticity in insects and their symbiotic microbes to cope with selection pressure implied by extensive insecticide applications and climate change. We also discuss how epigenetic changes are passed on to multiple generations through sexual recombination, which remains enigmatic. Finally, we explain how these epigenetic signatures can be utilized to manage insecticide resistance and pest resilience to climate change in Anthropocene.
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Iftikhar A, Hafeez F, Aziz MA, Hashim M, Naeem A, Yousaf HK, Saleem MJ, Hussain S, Hafeez M, Ali Q, Rehman M, Akhtar S, Marc RA, Syaad KMA, Mostafa YS, Saeed FAA. Assessment of sublethal and transgenerational effects of spirotetramat, on population growth of cabbage aphid, Brevicoryne brassicae L. (Hemiptera: Aphididae). Front Physiol 2022; 13:1014190. [PMID: 36579021 PMCID: PMC9791945 DOI: 10.3389/fphys.2022.1014190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 11/09/2022] [Indexed: 12/13/2022] Open
Abstract
The cabbage aphid (Brevicoryne brassicae L.) is a devastating pest of cruciferous crops causing economic damage worldwide and notably owing to its increasing resistance to commonly used pesticides. Such resistance prompts the development of integrated pest management (IPM) programs that include novel pesticides being effective against the aphids. Spirotetramat is a novel insecticide used against sap-sucking insect pests, particularly aphids. This study evaluated the toxicity of spirotetramat to adult apterous B. brassicae after 72 h using the leaf dipping method. According to the toxicity bioassay results, the LC50 value of spirotetramat to B. brassicae was 1.304 mgL-1. However, the sublethal concentrations (LC5 and LC15) and transgenerational effects of this novel insecticide on population growth parameters were estimated using the age-stage, two-sex life table theory method. The sublethal concentrations (LC5; 0.125 mgL-1 and LC15; 0.298 mgL-1) of spirotetramat reduced the adult longevity and fecundity of the parent generation (F0). These concentrations prolonged the preadult developmental duration while decreasing preadult survival, adult longevity and reproduction of the F1 generation. The adult pre-reproductive period was also extended by spirotetramat treatment groups. Subsequently, the population growth parameters such as the intrinsic rate of increase r, finite rate of increase λ and net reproductive rate R 0 of the F1 generation were decreased in spirotetramat treatment groups whereas, the mean generation time T of the F1 generation was not affected when compared to the control. These results indicated the negative effect of sublethal concentrations of spirotetramat on the performance of B. brassicae by reducing its nymphal survival, extending the duration of some immature stages and suppressing the population growth of B. brassicae. Overall, we demonstrated that spirotetramat is a pesticide showing both sublethal activities, and transgenerational effects on cabbage aphid; it may be useful for implementation in IPM programs against this aphid pest.
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Affiliation(s)
- Ayesha Iftikhar
- Entomological Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan,*Correspondence: Ayesha Iftikhar, ; Muhammad Hafeez,
| | - Faisal Hafeez
- Entomological Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | - Muhammad Asif Aziz
- Department of Entomology, Faculty of Crop and Food Sciences, Pir Mehr Ali Shah, Arid Agriculture University, Rawalpindi, Pakistan
| | - Muhammad Hashim
- Department of Entomology, Faculty of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
| | - Afifa Naeem
- Entomological Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | | | - Muhammad Jawad Saleem
- Entomological Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | - Sabir Hussain
- Department of Agriculture, Mir Chakar Khan Rind University, Sibi, Pakistan
| | - Muhammad Hafeez
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, Hangzhou, China,*Correspondence: Ayesha Iftikhar, ; Muhammad Hafeez,
| | - Qurban Ali
- Entomological Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | - Muzammal Rehman
- Key Laboratory of Plant Genetics and Breeding, College of Agriculture, Guangxi University, Nanning, China
| | - Sumreen Akhtar
- Department of Zoology, Faculty of Basic Sciences, University of the Punjab, Lahore, Pakistan
| | - Romina Alina Marc
- Food Engineering Department, Faculty of Food Science and Technology, University of Agricultural Science and Veterinary Medicine Cluj-Napoca, Cluj-Napoca, Romania
| | - Khalid M. Al Syaad
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Yassor Sabry Mostafa
- Department of Biology, College of Science, King Khalid University, Abha, Saudi Arabia
| | - Fatimah A. Al Saeed
- Department of Biology, Saudi Arabia Research Center for Advanced Materials Science (RCAMS), College of Science, King Khalid University, Abha, Saudi Arabia
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Britto IO, Araújo SHC, Toledo PFS, Lima GDA, Salustiano IV, Alves JR, Mantilla-Afanador JG, Kohlhoff M, Oliveira EE, Leite JPV. Potential of Ficus carica extracts against Euschistus heros: Toxicity of major active compounds and selectivity against beneficial insects. PEST MANAGEMENT SCIENCE 2021; 77:4638-4647. [PMID: 34092005 DOI: 10.1002/ps.6504] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/22/2021] [Accepted: 06/05/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Using plant-based extracts and their constituents has been suggested as an alternative tool to replace or integrate with the synthetic compounds used to manage insect pests. Here, we evaluated the potential of extracts obtained from Ficus carica Linn (Moraceae) branches and leaves against the Neotropical brown stink bug, Euschistus heros, one of the most prevalent insect pests in soybean fields. We further isolated and evaluated the toxicity of the extracts' major components against E. heros. Additionally, by using computational docking analysis and toxicological approaches, we assessed the physiological basis for the selectivity of these extracts against beneficial insects such as pollinator bees (i.e. Apis mellifera and the Neotropical stingless bee Partamona helleri), ladybeetles (Eriopis connexa and Coleomegilla maculata), and lacewings (Chrysoperla externa). RESULTS Our results demonstrate that branch (LC50 = 5.9 [4.7-7.1] mg mL-1 ) and leaf (LC50 = 14.1 [12.5-15.4] mg mL-1 ) extracts exhibited similar toxicity against E. heros. Our phytochemical analysis revealed psoralen and bergapten furanocoumarins as the major components of the extract. Based on our computational predictions, these molecules' differential abilities to physically interact with the acetylcholinesterases of E. heros and beneficial insects play relevant roles in their selectivity actions. The estimated LC90 values of branch (30.0 mg mL-1 ) and leaf (30.0 mg mL-1 ) extracts killed less than 12% of the beneficial insects. CONCLUSION Overall, our findings revealed that furanocoumarin-rich extracts obtained from F. carica extracts have the potential to be used as alternative tools in the integrated management of stink bug pests. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Isabella O Britto
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Sabrina H C Araújo
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Pedro F S Toledo
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Graziela D A Lima
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Iorrana V Salustiano
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Janaína R Alves
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Javier G Mantilla-Afanador
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
- Grupo de Pesquisa em Microbiologia e Biotecnologia Agroindustrial, Universidad Católica de Manizales, Manizales, Colombia
| | - Markus Kohlhoff
- Instituto Rene-Rachou, Fundação Oswaldo Cruz (Fiocruz), Belo Horizonte, Brazil
| | - Eugenio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - João Paulo V Leite
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Brazil
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11
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Rix RR, Cutler GC. Neonicotinoid Exposures that Stimulate Predatory Stink Bug, Podisus maculiventris (Hemiptera: Pentatomidae), Reproduction Do Not Inhibit Its Behavior. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:1575-1581. [PMID: 33974694 DOI: 10.1093/jee/toab085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Indexed: 06/12/2023]
Abstract
Exposure to sublethal amounts of pesticide can compromise life-history traits and behavior of natural enemies thereby reducing their effectiveness as predators. However, sublethal exposures to pesticides and other stressors may also stimulate insects, a dose-response phenomenon known as hormesis. We previously reported stimulatory effects on reproduction in the beneficial insect predator Podisus maculiventris (Say) (Hemiptera: Pentatomidae) following exposure to sublethal concentrations of imidacloprid. Here we examined whether these same treatments stimulated behavior and/or predation of P. maculiventris. Stimulation of some behaviors occurred at a reproductively hormetic concentration and two additional sublethal concentrations, depending upon bioassay design and sex. We observed no substantial inhibition of behavior or predation at a reproductively hormetic concentration, demonstrating that reproductive fitness in P. maculiventris may be stimulated without compromising behaviors important in its effectiveness as a natural enemy.
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Affiliation(s)
- R R Rix
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, PO Box 550, Truro, NS, B2N 5E3, Canada
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12
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Rigby LM, Johnson BJ, Peatey CL, Beebe NW, Devine GJ. The impact of sublethal permethrin exposure on susceptible and resistant genotypes of the urban disease vector Aedes aegypti. PEST MANAGEMENT SCIENCE 2021; 77:3450-3457. [PMID: 33818874 PMCID: PMC8252650 DOI: 10.1002/ps.6398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 03/13/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND In urban environments, some of the most common control tools used against the mosquito disease vector Aedes aegypti are pyrethroid insecticides applied as aerosols, fogs or residual sprays. Their efficacy is compromised by patchy deployment, aging residues, and the evolution and invasion of pyrethroid-resistant mosquitoes. A large proportion of mosquitoes in a given environment will therefore receive sublethal doses of insecticide. The potential impact of this sublethal exposure on the behaviour and biology of Ae. aegypti carrying commonly reported resistance alleles is poorly documented. RESULTS In susceptible insects, sublethal exposure to permethrin resulted in reductions in egg viability (13.9%), blood avidity (16.7%) and male mating success (28.3%). It caused a 70% decrease in the lifespan of exposed susceptible females and a 66% decrease in the insecticide-resistant females from the parental strain. Exposure to the same dose of insecticide in the presence of the isolated kdr genotype resulted in a smaller impact on female longevity (a 58% decrease) but a 26% increase in eggs per female and a 37% increase in male mating success. Sublethal permethrin exposure reduced host-location success by 20-30% in all strains. CONCLUSION The detrimental effects of exposure on susceptible insects were expected, but resistant insects demonstrated a less predictable range of responses, including negative effects on longevity and host-location but increases in fecundity and mating competitiveness. Overall, sublethal insecticide exposure is expected to increase the competitiveness of resistant phenotypes, acting as a selection pressure for the evolution of permethrin resistance. © 2021 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Lisa M Rigby
- Australian Defence Force Malaria and Infectious Disease InstituteGallipoli Barracks, EnoggeraQLDAustralia
- Mosquito Control LaboratoryQIMR Berghofer Medical Research InstituteHerstonQLDAustralia
- School of MedicineUniversity of QueenslandBrisbaneQLDAustralia
| | - Brian J Johnson
- Mosquito Control LaboratoryQIMR Berghofer Medical Research InstituteHerstonQLDAustralia
| | - Christopher L Peatey
- Australian Defence Force Malaria and Infectious Disease InstituteGallipoli Barracks, EnoggeraQLDAustralia
| | - Nigel W Beebe
- School of Biological SciencesUniversity of QueenslandBrisbaneQLDAustralia
- CSIROBrisbaneQLDAustralia
| | - Gregor J Devine
- Mosquito Control LaboratoryQIMR Berghofer Medical Research InstituteHerstonQLDAustralia
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13
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Castellanos NL, Ferreira-Filho NA, Rodrigues HS, Martínez LC, Serrão JE, Oliveira EE. Imidacloprid-mediated alterations on the salivary glands of the Neotropical brown stink bug, Euschistus heros. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:678-688. [PMID: 33788078 DOI: 10.1007/s10646-021-02388-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
The management of the Neotropical brown stinkbug Euschistus heros (Hemiptera: Pentatomidae) in soybean fields has been heavily dependent on the application of neonicotinoid insecticides. Neonicotinoids act primarily by impairing the function of the nicotinic acetylcholine receptors of the nervous system. These compounds also target specific organs (e.g., salivary glands), which may potentiate their insecticidal efficacy. Here, we evaluated whether the exposure to the neonicotinoid imidacloprid would cause cytomorphological changes in the salivary glands of E. heros. First, we determined the lethal concentrations (LCs) of imidacloprid through contact and ingestion. Subsequently, the cytomorphology of the salivary glands were evaluated in insect groups that survived exposure to the LC5 (3.75 mg a.i./L), LC50 (112.5 mg a.i./L), or LC75 (375.0 mg a.i./L, equivalent to the recommended field rate) doses. Imidacloprid induced apoptosis and necrosis in the salivary gland cells according to the insecticide concentration and salivary gland region. All concentrations increased apoptosis and injured cells (e.g., vacuolization, chromatin condensation, swelling of organelles, and plasma membrane rupture) in the principal and accessory salivary glands. Individuals that survived exposure to the highest concentrations (i.e., LC5 and LC50) were more affected, and exhibited several necrotic cells on their main principal salivary glands. Collectively, our results indicate that imidacloprid exerts toxic effects on the non-target organs, such as the salivary glands, which increases the efficacy of this compound in the management of stink bug infestations.
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Affiliation(s)
- Nathaly L Castellanos
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil.
| | | | - Higor S Rodrigues
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - Luis Carlos Martínez
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - José E Serrão
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - Eugenio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil.
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14
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Meijer N, de Rijk T, van Loon JJA, Zoet L, van der Fels-Klerx HJ. Effects of insecticides on mortality, growth and bioaccumulation in black soldier fly (Hermetia illucens) larvae. PLoS One 2021; 16:e0249362. [PMID: 33882072 PMCID: PMC8059818 DOI: 10.1371/journal.pone.0249362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 03/17/2021] [Indexed: 11/18/2022] Open
Abstract
Residues of persistent insecticides may be present in the substrates on which insects are reared for food and feed, which may affect insect growth or survival. In addition, insecticidal substances may bio-accumulate in reared insects. The objective of this study was to assess potential effects of selected insecticides on the growth and survival of black soldier fly larvae (BSFL, Hermetia illucens) and on their safety when used as animal feed. Six insecticides (chlorpyrifos, propoxur, cypermethrin, imidacloprid, spinosad, tebufenozide) with different modes of action were tested in two sequential experiments. Cypermethrin was also tested with the synergist piperonyl butoxide (PBO). Standard BSFL substrate was spiked to the respective maximum residue level (MRL) of each insecticide allowed by the European Union to occur in feed; and BSFL were reared on these substrates. Depending on the observed effects in the first experiment, spiked concentrations tested in the second experiment were increased or reduced. At the concentrations applied (1 and 10 times MRL), three of the six tested substances (chlorpyrifos, propoxur, tebufenozide) did not affect the survival or biomass growth of BSFL, compared to the control (non-spiked) treatments. At MRL, imidacloprid stimulated the growth of BSFL compared to the controls. Spinosad and cypermethrin at the MRL level negatively affected growth and survival. The effects of cypermethrin appeared to be augmented by addition of PBO. A mean bio-accumulation factor of ≤0.01 was found in both experiments for all substances-except for cypermethrin, which was comparatively high, but still below 1 (0.79 at 0.1 mg/kg). The lack of accumulation of insecticides in the larvae suggests that there is no risk of larval products being uncompliant with feed MRLs. However, we conclude that insecticides present in substrates may affect growth and survival of BSFL. More research on a larger variety of substances and insect species is recommended.
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Affiliation(s)
- Nathan Meijer
- Wageningen Food Safety Research, Wageningen, The Netherlands
| | - Theo de Rijk
- Wageningen Food Safety Research, Wageningen, The Netherlands
| | - Joop J. A. van Loon
- Plant Sciences Group, Laboratory of Entomology, Wageningen University, Wageningen, The Netherlands
| | - Lisa Zoet
- Bestico B.V., Berkel en Rodenrijs, The Netherlands
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15
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Pisa L, Goulson D, Yang EC, Gibbons D, Sánchez-Bayo F, Mitchell E, Aebi A, van der Sluijs J, MacQuarrie CJK, Giorio C, Long EY, McField M, Bijleveld van Lexmond M, Bonmatin JM. An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 2: impacts on organisms and ecosystems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:11749-11797. [PMID: 29124633 PMCID: PMC7921077 DOI: 10.1007/s11356-017-0341-3] [Citation(s) in RCA: 110] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/25/2017] [Indexed: 05/15/2023]
Abstract
New information on the lethal and sublethal effects of neonicotinoids and fipronil on organisms is presented in this review, complementing the previous Worldwide Integrated Assessment (WIA) in 2015. The high toxicity of these systemic insecticides to invertebrates has been confirmed and expanded to include more species and compounds. Most of the recent research has focused on bees and the sublethal and ecological impacts these insecticides have on pollinators. Toxic effects on other invertebrate taxa also covered predatory and parasitoid natural enemies and aquatic arthropods. Little new information has been gathered on soil organisms. The impact on marine and coastal ecosystems is still largely uncharted. The chronic lethality of neonicotinoids to insects and crustaceans, and the strengthened evidence that these chemicals also impair the immune system and reproduction, highlights the dangers of this particular insecticidal class (neonicotinoids and fipronil), with the potential to greatly decrease populations of arthropods in both terrestrial and aquatic environments. Sublethal effects on fish, reptiles, frogs, birds, and mammals are also reported, showing a better understanding of the mechanisms of toxicity of these insecticides in vertebrates and their deleterious impacts on growth, reproduction, and neurobehaviour of most of the species tested. This review concludes with a summary of impacts on the ecosystem services and functioning, particularly on pollination, soil biota, and aquatic invertebrate communities, thus reinforcing the previous WIA conclusions (van der Sluijs et al. 2015).
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Affiliation(s)
| | - Dave Goulson
- School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
| | - En-Cheng Yang
- Department of Entomology, National Taiwan University, Taipei, Taiwan
| | - David Gibbons
- RSPB Centre for Conservation of Science, The Lodge, Sandy, Bedfordshire, SG19 2DL, UK
| | - Francisco Sánchez-Bayo
- School of Life and Environmental Sciences, The University of Sydney, 1 Central Avenue, Eveleigh, NSW, 2015, Australia
| | - Edward Mitchell
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, 2000, Neuchâtel, Switzerland
| | - Alexandre Aebi
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, 2000, Neuchâtel, Switzerland
- Anthropology Institute, University of Neuchâtel, Rue Saint-Nicolas 4, 2000, Neuchâtel, Switzerland
| | - Jeroen van der Sluijs
- Centre for the Study of the Sciences and the Humanities, University of Bergen, Postboks 7805, 5020, Bergen, Norway
- Department of Chemistry, University of Bergen, Postboks 7805, 5020, Bergen, Norway
- Copernicus Institute of Sustainable Development, Environmental Sciences, Utrecht University, Heidelberglaan 2, 3584 CS, Utrecht, The Netherlands
| | - Chris J K MacQuarrie
- Natural Resources Canada, Canadian Forest Service, 1219 Queen St. East, Sault Ste. Marie, ON, P6A 2E5, Canada
| | | | - Elizabeth Yim Long
- Department of Entomology, The Ohio State University, 1680 Madison Ave, Wooster, OH, 44691, USA
| | - Melanie McField
- Smithsonian Institution, 701 Seaway Drive Fort Pierce, Florida, 34949, USA
| | | | - Jean-Marc Bonmatin
- Centre National de la Recherche Scientifique (CNRS), Centre de Biophysique Moléculaire, Rue Charles Sadron, 45071, Orléans, France.
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16
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Fortuin CC, McCarty E, Gandhi KJ. Acute contact with imidacloprid in soil affects the nesting and survival success of a solitary wild bee, Osmia lignaria (Hymenoptera: Megachilidae). CHEMOSPHERE 2021; 264:128572. [PMID: 33065319 DOI: 10.1016/j.chemosphere.2020.128572] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/02/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
We assessed impacts of direct acute contact with imidacloprid-treated soil on nesting behavior and mortality of the blue orchard mason bee (Osmia lignaria Say), which is a native solitary cavity-nesting species that collects mud for nest partitions. Laboratory-reared O. lignaria females were exposed to three concentrations of imidacloprid (0, 50, 390 and 780 ppb), in wet (30% moisture) soil for 20 min and released in large flight cages, where impacts on nesting activity and nest cell production were evaluated. Mortality was tested in another experiment using exposure at the same concentrations with two differing soil moisture levels (20% and 40%). Nesting activity was reduced by 42% for females exposed at 390 ppb and by 66% for females exposed at 780 ppb. Females treated at 780 ppb produced 40% fewer nest cells per day. Sex ratios of F1 generation were skewed toward male in the 50 ppb treatment group with 50% fewer females. The number of cells and pre-pupae per nest, as well as the weight of pre-pupal cocoons did not vary among exposure levels. There were no mortality effects at 20% soil moisture for any level of imidacloprid, but at 40%, mortality of females was >50% at all levels of imidacloprid. These results suggest that acute exposure to imidacloprid residue in soil can have negative impacts on soil-interacting bees, and the effects may be relative to the degree of soil moisture.
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Affiliation(s)
- Christine Cairns Fortuin
- D.B. Warnell School of Forestry and Natural Resources, 180 E Green Street, University of Georgia, Athens, GA, 30602, USA.
| | - Elizabeth McCarty
- D.B. Warnell School of Forestry and Natural Resources, 180 E Green Street, University of Georgia, Athens, GA, 30602, USA
| | - Kamal Jk Gandhi
- D.B. Warnell School of Forestry and Natural Resources, 180 E Green Street, University of Georgia, Athens, GA, 30602, USA
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17
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Rodrigues HS, Haddi K, Campos MO, Ferreira-Filho NA, Guedes RNC, Newland PL, Oliveira EE. Synergism and unintended effects of the association between imidacloprid and sodium chloride (NaCl) on the management of Euschistus heros. PEST MANAGEMENT SCIENCE 2021; 77:417-424. [PMID: 32761689 DOI: 10.1002/ps.6032] [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: 04/22/2020] [Revised: 07/13/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The use of insecticidal solutions containing sodium chloride (NaCl) has been proposed as a more environmentally friendly alternative to managing stink bug infestations of Neotropical soybean fields. The potential sublethal and undesirable effects of this practice have, however, been overlooked, especially with novel insecticides. Here, we have evaluated experimentally whether the addition of NaCl (0.5% w/v) to imidacloprid-containing solutions could alter insecticide toxicity and modify the reproductive responses of the Neotropical brown stink bug Euschistus heros. RESULTS Adding NaCl to imidacloprid solutions significantly increased imidacloprid toxicity against E. heros. The exposure to E. heros to sublethal concentrations of imidacloprid affected the insect's mating abilities in a concentration-dependent manner. The addition of NaCl to solutions containing imidacloprid at concentrations as low as 0.126 μg a.i. cm-2 (i.e. the equivalent to 3% of field rate recommendation) also impacted the sexual behavior of E. heros, reducing mating duration. NaCl-exposed stink bugs, however, exhibited higher fecundity and fertility rates than those insects that were unexposed to NaCl or those that were exposed to sublethal levels of imidacloprid only. CONCLUSIONS The addition of low amounts of NaCl resulted in a higher toxicity of imidacloprid. This practice, however, can also lead to undesirable effects as increasing reproductive output of E. heros that can potentially compromise the management of these insect pests.
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Affiliation(s)
- Hígor S Rodrigues
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Khalid Haddi
- Departamento de Entomologia, Universidade Federal de Lavras, Lavras, Brazil
| | - Mateus O Campos
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | | | | | | | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
- Departament of Entomology, Genetics and Neuroscience Programs, Michigan State University, East Lansing, MI, USA
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18
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Mahmoodi L, Mehrkhou F, Guz N, Forouzan M, Atlihan R. Sublethal effects of three insecticides on fitness parameters and population projection of Brevicoryne brassicae (Hemiptera: Aphididae). JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:2713-2722. [PMID: 32918545 DOI: 10.1093/jee/toaa193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Indexed: 06/11/2023]
Abstract
The cabbage aphid, Brevicoryne brassicae (L.), is one of the major insect pests of cole crops in Iran. In most instances outbreaks are normally kept under control by application of insecticides. In this study, the sublethal effects (LC30) of three insecticides, acetamiprid, buprofezin, and thiamethoxam-lambda cyhalothrin, (TLC) were evaluated on the population growth rate of the progeny of insecticide-treated cabbage aphid adults. The age-stage, two-sex life table method was used to analyze the collected data. The results indicated that the insecticide applications affected the duration of the preadult period, their survival, reproduction, life span/longevity, and consequently, the population growth rate of the F1 generation. The indicators of the greatest sublethal effects were noted in the progeny of the TLC-treated adults. These included the lowest net reproductive rate (R0), intrinsic rate of increase (r), finite rate of increase (λ), and the longest mean generation time (T). The highest values of r, λ, R, and the lowest value of T occurred in the control group followed by, in order, the acetamiprid and buprofezin groups. These research findings will be useful in the development and implementation of future aphid management programs.
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Affiliation(s)
- Leila Mahmoodi
- Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran
| | - Fariba Mehrkhou
- Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran
| | - Nurper Guz
- Department of Plant Protection, Molecular Entomology Laboratory, Faculty of Agriculture, Ankara University, Ankara, Turkey
| | - Maryam Forouzan
- Plant Protection Research Department, West Azarbaijan Agricultural and Natural Resources Research Center, AREEO, Urmia, Iran
| | - Remzi Atlihan
- Department of Plant Protection, Faculty of Agriculture, University of Van Yuzuncu Yil, Van, Turkey
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19
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Rix RR, Cutler GC. Low Doses of a Neonicotinoid Stimulate Reproduction in a Beneficial Predatory Insect. JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:2179-2186. [PMID: 32814948 DOI: 10.1093/jee/toaa169] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Biological stimulation induced by low doses of toxicants or other stressors is known as hormesis. Hormetic stimulation of life history traits in insect pests can negatively impact agriculture, but stimulation of beneficial insects could be leveraged to enhance biological control agents. We examined whether low doses of imidacloprid could enhance oviposition, fecundity, fertility, and survival in the beneficial stink bug predator, Podisus maculiventris (Say) (Hemiptera: Pentatomidae), exposed at different life stages and across two generations. When treated as young adults, P. maculiventris fecundity was stimulated at 0.5 and 1.0 mg/liter imidacloprid (<2% of the field rate) without changes in time to oviposition, fertility, and survival. Nymphs exposed to 0.015 mg/liter imidacloprid (<1% of the field rate) also had stimulated reproduction without effects on oviposition, fertility, and survival, but treatment of nymphs at 0.15 and 1.5 mg/liter imidacloprid stimulated fecundity at the expense of fertility and survival. In another experiment we found reproductive stimulation can occur trans-generationally without major reduction in fertility or survival. Our results suggest biocontrol producers may be able to strategically apply low doses of stress to natural enemies during culturing without compromising fitness in subsequent generations.
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Affiliation(s)
- R R Rix
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS
| | - G C Cutler
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS
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20
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Andreazza F, Haddi K, Nörnberg SD, Guedes RNC, Nava DE, Oliveira EE. Sex-dependent locomotion and physiological responses shape the insecticidal susceptibility of parasitoid wasps. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114605. [PMID: 32380390 DOI: 10.1016/j.envpol.2020.114605] [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: 02/20/2020] [Revised: 04/14/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
The adaptive fitness of insect species can be shaped by how males and females respond, both physiologically and behaviorally, to environmental challenges, such as pesticide exposure. In parasitoid wasps, most toxicological investigations focus only on female responses (e.g., survival and especially parasitism abilities), leaving the male contributions to adaptive fitness (survival, locomotion, mate search) poorly investigated. Here, we evaluated the toxicity of the spinosyn insecticide spinosad against the South American fruit fly, Anastrepha fraterculus, and we used the parasitoid wasp Diachasmimorpha longicaudata (Ashmead) to evaluate whether sex-linked locomotory and physiological responses would influence the susceptibility of these organisms to spinosad. Our results revealed that D. longicaudata males were significantly more susceptible (median lethal time (LT50) = 24 h) to spinosad than D. longicaudata females (LT50 = 120 h), which may reflect the differences in their locomotory and physiological (e.g., respiratory) responses to mitigate insecticide exposure. Compared to D. longicaudata females, male wasps were lighter (P < 0.001), walked for longer distances (P < 0.001) and periods (P < 0.001), and exhibited higher sensilla densities in their tarsi (P = 0.008), which may facilitate their intoxication with the insecticide. These findings indicate that male parasitoids should not be exempt from insecticide selectivity tests, as these organisms can be significantly more affected by such environmental challenges than their female conspecifics.
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Affiliation(s)
- Felipe Andreazza
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil; Departament of Entomology, Michigan State University, East Lansing, MI, 48823, USA
| | - Khalid Haddi
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil; Departamento de Entomologia, Universidade Federal de Lavras, Lavras, MG, 37200-000, Brazil
| | - Sandro D Nörnberg
- Embrapa Clima Temperado, Laboratory of Entomology, Pelotas, RS, 96010-971, Brazil
| | - Raul Narciso C Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Dori E Nava
- Embrapa Clima Temperado, Laboratory of Entomology, Pelotas, RS, 96010-971, Brazil
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil; Departament of Entomology, Michigan State University, East Lansing, MI, 48823, USA.
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21
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Mulvey J, Cresswell JE. Time-dependent effects on bumble bees of dietary exposures to farmland insecticides (imidacloprid, thiamethoxam and fipronil). PEST MANAGEMENT SCIENCE 2020; 76:2846-2853. [PMID: 32237102 DOI: 10.1002/ps.5838] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/25/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Farmland bees encounter insecticides in their diet when visiting the flowers of pesticide-treated crops with residues in nectar and pollen. A sustained exposure to even trace residues could be severely harmful if the ingested substance has a long biological half-life and its toxicity therefore intensifies over time, which is termed time-reinforced toxicity (TRT). Bumble bees are important farmland pollinators, but their susceptibility to TRT from insecticides has not been established previously. This study therefore investigated the potential for three farmland insecticides (imidacloprid, thiamethoxam and fipronil) to generate TRT in bumble bees (Bombus terrestris L.) by dietary exposure in the laboratory using lethality as an endpoint under both fixed-dose and pulsed-dose regimes. RESULTS The insecticides varied in toxic effect. Fipronil exposures produced a dose-dependent reduction in longevity (days of exposure survived) and strong TRT with no evidence of clearance-based recovery. Thiamethoxam exposures also produced a dose-dependent reduction in longevity, but with moderate TRT and evidence of some clearance-based recovery. Imidacloprid exposures produced a hormesis with reduced longevity only at the highest doses and an absence of TRT. CONCLUSION Our study further confirms the potential for certain dietary insecticides at trace levels to harm farmland bees during sustained exposures because of their capacity to cause time-reinforced toxicity. Our findings suggest that regulatory oversight of pesticides will better safeguard bee health by testing the active ingredients of farmland agrochemicals for their capacity to produce TRT in these ecologically important nontarget organisms. Our study demonstrates the potential for certain dietary insecticides at trace levels to harm farmland bumble bees during sustained exposures because of their capacity to cause time-reinforced toxicity. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Jessica Mulvey
- Biosciences, College of Life & Environmental Sciences, University of Exeter, Hatherly Laboratories, Exeter, UK
| | - James E Cresswell
- Biosciences, College of Life & Environmental Sciences, University of Exeter, Hatherly Laboratories, Exeter, UK
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22
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Resende-Silva GA, Joseph DA, Guedes RNC, Cutler GC. Impact of Imidacloprid Soil Drenching on Survival, Longevity, and Reproduction of the Zoophytophagous Predator Podisus maculiventris (Hemiptera: Pentatomidae: Asopinae). JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:108-114. [PMID: 31675095 DOI: 10.1093/jee/toz283] [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: 07/24/2019] [Indexed: 06/10/2023]
Abstract
Systemic insecticides when applied as seed treatments or soil drenches are often more toxicologically selective for natural enemies than target pests. This may not be the case, however, for omnivorous predators, which are at risk of extended exposure to systemically applied pesticides through ingestion while feeding on treated plants for nutrients or water. Such exposure may kill or have sublethal consequences for these natural enemies, compromising their role as biocontrol agents of agricultural pest species. The spined soldier bug, Podisus maculiventris (Say) (Hemiptera: Pentatomidae: Asopinae), is an important zoophytophagous biocontrol agent (i.e., able to substitute zoophagy by phytophagy for survival) that may be exposed to systemic insecticides in many agricultural systems. We, therefore, examined effects on P. maculiventris following exposure to cabbage plants subject to soil-drench treatments with imidacloprid, a systemic neonicotinoid insecticide. Predator survival, development, body weight, and reproduction were recorded. Imidacloprid significantly affected nymph survival and adult emergence, but not duration of the nymphal period or adult body weight. At one-twentieth the recommended field rate for whitefly and aphid management, imidacloprid treatments reduced longevity, fecundity, and fertility of female predators. These findings demonstrate that soil treatments with systemic insecticide can negatively impact zoophytophagous natural enemies.
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Affiliation(s)
- Geverson A Resende-Silva
- Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Deney A Joseph
- Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada
| | | | - G Christopher Cutler
- Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada
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23
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Young HK, Denecke SM, Robin C, Fournier-Level A. Sublethal larval exposure to imidacloprid impacts adult behaviour in Drosophila melanogaster. J Evol Biol 2019; 33:151-164. [PMID: 31637792 DOI: 10.1111/jeb.13555] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 10/07/2019] [Accepted: 10/11/2019] [Indexed: 12/27/2022]
Abstract
Pesticides are now chronically found in numerous ecosystems incurring widespread toxic effects on multiple organisms. For insects, the larvae are very exposed to pesticide pollution and the acute effect of insecticides on larvae has been characterized in a range of species. However, the carry-on effects in adults of sublethal exposure occurring in larvae are not well characterized. Here, we use a collection of strains of Drosophila melanogaster differing in their larval resistance to a commonly used insecticide, imidacloprid, and we test the effect of larval exposure on behavioural traits at the adult stage. Focusing on locomotor activity and on courtship and mating behaviour, we observed a significant carry-on effect of imidacloprid exposure. The heritability of activity traits measured in flies exposed to imidacloprid was higher than measured in controls and in these, courtship traits were genetically less correlated from mating success. Altogether, we did not observe a significant effect of the larval insecticide resistance status on adult behavioural traits, suggesting that selection for resistance in larvae does not involve repeatable behavioural changes in adults. This lack of correlation between larval resistance and adult behaviour also suggests that resistance at the larval stage does not necessarily result in increased behavioural resilience at a later life stage. These findings imply that selection for resistance in larvae as well as for behavioural resilience to sublethal exposure in adult will combine and impose a greater evolutionary constraint. Our conclusions further substantiate the need to encompass multiple trait measures and life stages in toxicological assays to properly assess the environmental impact of pesticides.
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Affiliation(s)
- Helen K Young
- School of BioSciences, The University of Melbourne, Parkville, Vic., Australia
| | - Shane M Denecke
- Institute of Molecular Biology and Biotechnology FORTH, Heraklion, Greece
| | - Charles Robin
- School of BioSciences, The University of Melbourne, Parkville, Vic., Australia
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Feng WB, Bong LJ, Dai SM, Neoh KB. Effect of imidacloprid exposure on life history traits in the agricultural generalist predator Paederus beetle: Lack of fitness cost but strong hormetic effect and skewed sex ratio. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:390-400. [PMID: 30849660 DOI: 10.1016/j.ecoenv.2019.03.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 02/21/2019] [Accepted: 03/01/2019] [Indexed: 06/09/2023]
Abstract
A trade-off between life history traits in the evolution of insecticide resistance is common in insects because energy acquisition is mainly channeled for detoxification enzyme production. In addition, sublethal exposure to insecticides may have an effect on the physiology and behaviors of surviving insects. Similar to other agricultural pests, pesticide use may have led to insecticide resistance in populations of Paederus fuscipes Curtis. In this study, we determined the median lethal time of 10 field-collected strains in Taiwan for three insecticides that are commonly employed to manage agricultural pests. We determined that the susceptibility of these strains to cyhalothrin and fenitrothion were similar, with resistance ratios (RRs) ranging from 1 to 4; however, significantly different to imidacloprid (RRs: 1-16). The effect of imidacloprid resistance on the life history traits studied of Paederus beetles was limited; only a prolonged egg incubation period, and adult longevity decreased as imidacloprid resistance increased. Regarding sublethal exposure to imidacloprid, adult sex ratios were female biased in most combinations, though nonsignificant. The quality of offspring, particularly the length of eggs significantly decreased. In addition, a hormetic effect was apparent when the individual was exposed to LT25 and LT50; mean fecundity per female increased from 12.80 ± 8.95 (± standard error [SE]) to 42.70 ± 13.77 eggs compared with that of the control (7.10 ± 1.32). However, the hormetic effect was inconsistent among the tested strains, possibly because of the difference in insecticide resistance levels given that reproductive compensation was absent among the resistant population.
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Affiliation(s)
- Wen-Bin Feng
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung 402, Taiwan
| | - Lee-Jin Bong
- National Mosquito-borne Diseases Control Research Center, National Health Research Institute, Zhunan, Miaoli County, Taiwan, ROC
| | - Shu-Mei Dai
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung 402, Taiwan
| | - Kok-Boon Neoh
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung 402, Taiwan.
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25
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Cremonez PSG, Matsumoto JF, Andrello AC, Roggia S, Pinheiro DO, Neves PMOJ. Macro-elements in the hemolymph of adult Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) treated with pyriproxyfen. Comp Biochem Physiol C Toxicol Pharmacol 2019; 220:47-51. [PMID: 30825637 DOI: 10.1016/j.cbpc.2019.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/11/2019] [Accepted: 02/25/2019] [Indexed: 12/12/2022]
Abstract
Euschistus heros is an important pest in many crops in Brazil, and different control strategies, mainly involving chemicals, have been evaluated; however, the side effects of these chemicals on the balance of inorganic element levels in the hemolymph are unknown. Thus, the aim of this work was to determine the concentration of inorganic elements (focusing on macro-elements) in the hemolymph of female and male E. heros adults, after applying pyriproxyfen at a sublethal concentration (LC30 = 6.68 mL L-1 diluted in distilled water) to 4th instar nymphs, which were kept in controlled conditions. The hemolymph pool was removed 48 h after adult emergence, centrifuged and placed on an acrylic disk added with Gallium as internal standard for the analysis of total reflection X-ray fluorescence. Most of the elements in the control treatment did not differ between females and males. However, following insecticide application to females and males, respectively, there was a significant increase in sulfur (19 and 51%), chlorine (33 and 137%) and calcium (47 and 82%) in the hemolymph. The significantly higher increase in macro-elements in males' hemolymph indicates that the action of pyriproxyfen may be sex-specific. Phosphorus and potassium concentrations also differed between females and males in the control and treated groups. The observed variation in inorganic elements in the insect's hemolymph may be related to the unknown effects of pyriproxyfen, mainly on immune and reproductive performance.
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Affiliation(s)
- Paulo S G Cremonez
- Department of Agronomy, State University of Londrina - UEL, Rod. Celso Garcia Cid, PR-445, Km 380, Mailbox: 10.011, 86057-970 Londrina, Paraná State, Brazil
| | - Janaina F Matsumoto
- Department of Agronomy, State University of Londrina - UEL, Rod. Celso Garcia Cid, PR-445, Km 380, Mailbox: 10.011, 86057-970 Londrina, Paraná State, Brazil
| | - Avacir C Andrello
- Department of Physics, State University of Londrina - UEL, Rod. Celso Garcia Cid, PR-445, Km 380, Cx. Postal 10.011, CEP 86057-970 Londrina, PR, Brazil.
| | - Samuel Roggia
- Empresa Brasileira de Pesquisa Agropecuária - Embrapa Soja, Rod. Carlos João Strass, PR-545, s/n, Acesso Orlando Amaral, Mailbox: 23, Warta, 86001-970 Londrina, Paraná State, Brazil.
| | - Daniela O Pinheiro
- Department of Histology, State University of Londrina - UEL, Rod. Celso Garcia Cid, PR-445, Km 380, Cx. Postal 10.011, CEP 86057-970 Londrina, PR, Brazil.
| | - Pedro M O J Neves
- Department of Agronomy, State University of Londrina - UEL, Rod. Celso Garcia Cid, PR-445, Km 380, Mailbox: 10.011, 86057-970 Londrina, Paraná State, Brazil.
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Chronic contact with realistic soil concentrations of imidacloprid affects the mass, immature development speed, and adult longevity of solitary bees. Sci Rep 2019; 9:3724. [PMID: 30842465 PMCID: PMC6403430 DOI: 10.1038/s41598-019-40031-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 02/04/2019] [Indexed: 11/28/2022] Open
Abstract
The non-target effects of pesticides are an area of growing concern, particularly for ecologically and economically important organisms such as bees. Much of the previous research on the effects of neonicotinoids, a class of insecticide that has gained attention for non-target effects, on bees focused on the consumption of contaminated food resources by a limited number of eusocial species. However, neonicotinoids are known to accumulate and persist in soils at concentrations 2 to 60 times greater than in food resources, and may represent an important route of exposure for diverse and ecologically important ground-nesting bees. This study aimed to assess the effect of chronic contact exposure to realistic soil concentrations of imidacloprid, the most widely used neonicotinoid pesticide, on bee longevity, development speed, and body mass. Cohorts of Osmia lignaria and Megachile rotundata were used as proxies for ground-nesting species. We observed species- and sex-specific changes to adult longevity, development speed, and mass in response to increasing concentrations of imidacloprid. These results suggest that chronic exposure to nesting substrates contaminated with neonicotinoids may represent an important route of exposure that could have considerable physiological and ecological consequences for bees and plant-pollinator interactions.
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27
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Anderson NL, Harmon-Threatt AN. Chronic contact with realistic soil concentrations of imidacloprid affects the mass, immature development speed, and adult longevity of solitary bees. Sci Rep 2019; 283:131177. [PMID: 30842465 DOI: 10.1016/j.chemosphere.2021.131177] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 05/28/2023] Open
Abstract
The non-target effects of pesticides are an area of growing concern, particularly for ecologically and economically important organisms such as bees. Much of the previous research on the effects of neonicotinoids, a class of insecticide that has gained attention for non-target effects, on bees focused on the consumption of contaminated food resources by a limited number of eusocial species. However, neonicotinoids are known to accumulate and persist in soils at concentrations 2 to 60 times greater than in food resources, and may represent an important route of exposure for diverse and ecologically important ground-nesting bees. This study aimed to assess the effect of chronic contact exposure to realistic soil concentrations of imidacloprid, the most widely used neonicotinoid pesticide, on bee longevity, development speed, and body mass. Cohorts of Osmia lignaria and Megachile rotundata were used as proxies for ground-nesting species. We observed species- and sex-specific changes to adult longevity, development speed, and mass in response to increasing concentrations of imidacloprid. These results suggest that chronic exposure to nesting substrates contaminated with neonicotinoids may represent an important route of exposure that could have considerable physiological and ecological consequences for bees and plant-pollinator interactions.
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Affiliation(s)
- Nicholas L Anderson
- University of Illinois at Urbana-Champaign, Department Of Entomology, 505 S. Goodwin Ave., Urbana, IL, 61801, United States.
| | - Alexandra N Harmon-Threatt
- University of Illinois at Urbana-Champaign, Department Of Entomology, 505 S. Goodwin Ave., Urbana, IL, 61801, United States
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28
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Chiluwal K, Kim J, Bae SD, Roh GH, Park HJ, Park CG. Effect of Gamma Irradiation on Fecundity, Sterility, and Female Sex Pheromone Production of Callosobruchus chinensis (Coleoptera: Bruchidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:156-163. [PMID: 30321388 DOI: 10.1093/jee/toy317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Indexed: 06/08/2023]
Abstract
Azuki bean beetle, Callosobruchus chinensis (L.) (Coleoptera: Bruchidae), is a field-to-storage pest of legumes and its females produce sex pheromone components with two isomers: (2Z,6E)-7-ethyl-3,11-dimethyl-2,6,10-dodecatrienal (2Z-homofarnesal) and (2E,6E)-7-ethyl-3,11-dimethyl-2,6,10-dodecatrienal (2E-homofarnesal). Two-day-old virgin adults were treated with different doses (0, 200, 300, 400, 500, and 600 Gy) of gamma radiation and the effects on adult survivorship, fecundity, sterility, and pheromone production were studied. The longevity of both sexes and female fecundity were dose dependently affected by the gamma irradiation revealing that the fecundity was more reduced when the female adults were irradiated. Adults of both sexes were totally sterilized by the doses of gamma radiation tested in this study as depicted by the null hatchability of the laid eggs. The results from analyses by gas chromatography-mass spectrometry for solid phase micro-extraction revealed that both of the female sex pheromone components were significantly reduced by 300 Gy. Though significantly less, there was release of some amount of pheromone components by the irradiated female azuki bean beetles revealing the possibility of pheromonal attraction of males to the irradiated females. It is a pre-requisite for the successful sterile insect technology that the sterility of azuki bean beetle is induced without the total disruption of the calling behavior.
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Affiliation(s)
- Kashinath Chiluwal
- Division of Applied Life Science (BK21+ Program)/Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
- Nepal Agricultural Research Council (NARC), Kathmandu, Nepal
| | - Junheon Kim
- Forest Insect Pest and Disease Division, National Institute of Forest Science, Seoul, Republic of Korea
| | - Soon Do Bae
- Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang, Republic of Korea
| | - Gwang Hyun Roh
- Agroecosystem Management Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Lincoln, NE
| | - Hae Jun Park
- Biotechnology Division, Advanced Radiation Technology Institute, KAERI, Jeongeup-si, Jeollabuk-do, Korea
| | - Chung Gyoo Park
- Division of Applied Life Science (BK21+ Program)/Institute of Life Science, Gyeongsang National University, Jinju, Republic of Korea
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29
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Castellanos NL, Smagghe G, Sharma R, Oliveira EE, Christiaens O. Liposome encapsulation and EDTA formulation of dsRNA targeting essential genes increase oral RNAi-caused mortality in the Neotropical stink bug Euschistus heros. PEST MANAGEMENT SCIENCE 2019; 75:537-548. [PMID: 30094917 DOI: 10.1002/ps.5167] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 08/01/2018] [Accepted: 08/03/2018] [Indexed: 05/28/2023]
Abstract
BACKGROUND The Neotropical stink bug Euschistus heros is a major pest in soybean fields. Development of highly species-specific pesticides based on RNA interference (RNAi) could provide a new sustainable and environmentally friendly control strategy. RESULTS Here, the potential of RNAi as a pest control tool against E. heros was assessed. First, target gene selection using a microinjection approach was performed. Seven of the 15 candidate genes tested exhibited > 95% mortality after hemolymph injection of 27.5 ng dsRNA. Subsequently, dsRNA was administered orally using different formulations: naked dsRNA, liposome-encapsulated-dsRNA and dsRNA formulated with EDTA. Liposome-encapsulated dsRNA targeting vATPase A and muscle actin led to significant mortality after 14 days (45% and 42%, respectively), whereas EDTA-formulated dsRNA did so for only one of the target genes. Ex vivo analysis of the dsRNA stability in collected saliva indicated a strong dsRNA-degrading capacity by E. heros saliva, which could explain the need for dsRNA formulations. CONCLUSION The results demonstrate that continuous ingestion of dsRNA with EDTA or liposome-encapsulated dsRNA can prevent dsRNA from being degraded enzymatically and suggest great potential for using these formulations in dsRNA delivery to use RNAi as a functional genomics tool or for pest management of stink bugs. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Nathaly L Castellanos
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Guy Smagghe
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Rohit Sharma
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Olivier Christiaens
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
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30
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Li XR, Li Y, Wang W, He N, Tan XL, Yang XQ. LC 50 of lambda-cyhalothrin stimulates reproduction on the moth Mythimna separata (Walker). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 153:47-54. [PMID: 30744896 DOI: 10.1016/j.pestbp.2018.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/11/2018] [Accepted: 11/01/2018] [Indexed: 06/09/2023]
Abstract
Lambda-cyhalothrin has long been recommended as an effective insecticide to control the oriental armyworm, Mythimna separata (Walker), a notorious migratory pest of agricultural plants. Previous researches have suggested that survival, development, and reproduction of insects are influenced by sublethal concentrations of insecticides. However, the effects of sublethal concentrations of lambda-cyhalothrin on M. separata are less known. In this study, we determined the toxicity and effects of LC20 and LC50 concentration of lambda-cyhalothrin on development and reproduction of M. separata. Results indicate that LC20 of lambda-cyhalothrin tends to decrease the life traits of M. separate, with a shortening larvae period of offspring and oviposition period, whereas LC50 of lambda-cyhalothrin stimulates daily maximal fecundity and forwards the oviposition peak, suggesting a stimulation of reproduction by LC50 of lambda-cyhalothrin. The M. separata population was increased by an LC50 concentration of lambda-cyhalothrin, resulting in a net reproductive rate (R0) and intrinsic rate of increase (rm) significantly higher than that of the control. Transcripts of vitellogenin (MsVg) and vitellogenin receptor (MsVgR) genes were suppressed at day 1 after emergence of moth which developed from the larvae exposed to LC20 and LC50 of lambda-cyhalothrin, but were significant induced when the moth begin to lay eggs (day 4), with a more remarkable induction by LC50 of lambda-cyhalothrin than those of LC20 of lambda-cyhalothrin. Our results indicate that the observed stimulation of reproduction is therefore the results of up-regulation of MsVg and MsVgR by LC50 of lambda-cyhalothrin.
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Affiliation(s)
- Xin-Ru Li
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Yue Li
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Wei Wang
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Ning He
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Xiao-Ling Tan
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Xue-Qing Yang
- Key Laboratory of Economic and Applied Entomology of Liaoning Province, College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China.
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31
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Holder PJ, Jones A, Tyler CR, Cresswell JE. Fipronil pesticide as a suspect in historical mass mortalities of honey bees. Proc Natl Acad Sci U S A 2018; 115:13033-13038. [PMID: 30509996 PMCID: PMC6304995 DOI: 10.1073/pnas.1804934115] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Mass mortalities of honey bees occurred in France in the 1990s coincident with the introduction of two agricultural insecticides, imidacloprid and fipronil. Imidacloprid, a neonicotinoid, was widely blamed, but the differential potency of imidacloprid and fipronil has been unclear because of uncertainty over their capacity to bioaccumulate during sustained exposure to trace dietary residues and, thereby, cause time-reinforced toxicity (TRT). We experimentally quantified the toxicity of fipronil and imidacloprid to honey bees and incorporated the observed mortality rates into a demographic simulation of a honey bee colony in an environmentally realistic scenario. Additionally, we evaluated two bioassays from new international guidance for agrochemical regulation, which aim to detect TRT. Finally, we used analytical chemistry (GC-MS) to test for bioaccumulation of fipronil. We found in demographic simulations that only fipronil produced mass mortality in honey bees. In the bioassays, only fipronil caused TRT. GC-MS analysis revealed that virtually all of the fipronil ingested by a honey bee in a single meal was present 6 d later, which suggests that bioaccumulation is the basis of TRT in sustained dietary exposures. We therefore postulate that fipronil, not imidacloprid, caused the mass mortalities of honey bees in France during the 1990s because it is lethal to honey bees in even trace doses due to its capacity to bioaccumulate and generate TRT. Our results provide evidence that recently proposed laboratory bioassays can discriminate harmful bioaccumulative substances and, thereby, address evident shortcomings in a regulatory system that had formerly approved fipronil for agricultural use.
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Affiliation(s)
| | - Ainsley Jones
- Fera Science Ltd., Sand Hutton, YO41 1LZ York, United Kingdom
| | - Charles R Tyler
- Biosciences, University of Exeter, EX4 4PS Exeter, United Kingdom
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Ding J, Zhao Y, Zhang Z, Xu C, Mu W. Sublethal and Hormesis Effects of Clothianidin on the Black Cutworm (Lepidoptera: Noctuidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:2809-2816. [PMID: 30551214 DOI: 10.1093/jee/toy254] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Indexed: 06/09/2023]
Abstract
The black cutworm, Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae), has been considered a major insect pest in China that causes damage to corn at the seeding stage. The present study measured the lethal and sublethal effects of the neonicotinoid insecticide clothianidin on A. ipsilon. Clothianidin, incorporated using an artificial diet, exhibited signs of active toxicity on fourth-instar larvae of A. ipsilon, with a 50%-lethal concentration (LC50) of 27.77 µg/g. Clothianidin at the LC20 and LC40 levels impaired the normal development of A. ipsilon by prolonging the larval period, decreasing the rate of pupation and eclosion, reducing longevity, shortening the oviposition period, and reducing the fecundity of female adults. Consequently, these effects resulted in the reduction of some population parameter values of A. ipsilon, including the intrinsic rate of increase (r), finite rate of increase (λ), and net reproductive rate (R0), along with an increase in the mean generation time (T). However, stimulatory effects, i.e., hormesis, on reproduction were observed in A. ipsilon exposed to an LC5 level based on the fecundity (2,213.62 eggs per female) and net reproductive rate (R0) (863.04 offspring per individual), which were significantly higher than values in the control group (1,344.77 eggs per female and 591.82 offspring per individual). Therefore, the results obtained in this study may assist in the development of optimized integrated pest management strategies, although the results require further study for corroboration under real cropping conditions.
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Affiliation(s)
- Jinfeng Ding
- College of Plant Protection, Shandong Agricultural University, 61 Daizong Street, Tai'an, Shandong, P.R. China
| | - Yunhe Zhao
- College of Plant Protection, Shandong Agricultural University, 61 Daizong Street, Tai'an, Shandong, P.R. China
| | - Zhengqun Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Daizong Street, Tai'an, Shandong, P.R. China
| | - Chunmei Xu
- College of Plant Protection, Shandong Agricultural University, 61 Daizong Street, Tai'an, Shandong, P.R. China
| | - Wei Mu
- College of Plant Protection, Shandong Agricultural University, 61 Daizong Street, Tai'an, Shandong, P.R. China
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Viteri Jumbo LO, Haddi K, Faroni LRD, Heleno FF, Pinto FG, Oliveira EE. Toxicity to, oviposition and population growth impairments of Callosobruchus maculatus exposed to clove and cinnamon essential oils. PLoS One 2018; 13:e0207618. [PMID: 30444910 PMCID: PMC6239305 DOI: 10.1371/journal.pone.0207618] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 11/02/2018] [Indexed: 11/21/2022] Open
Abstract
The use of plant essential oils has been shown to efficiently control insect pests of stored beans, significantly reducing the threats associated with synthetic insecticides. Here, we evaluated the potential of applications of essential oils of clove, Syzygium aromaticum L., and cinnamon, Cinnamomum zeylanicum L., to control Callosobruchus maculatus, considered as one of the most cosmopolitan pests of stored beans. Using four combinations of couples (i.e., unexposed couples, exposed females, exposed males, and exposed couples), we also evaluated how sublethal exposure to these essential oils impacted C. maculatus oviposition. Bioassays results revealed that both essential oils exhibited insecticidal activities similar to the synthetic pyrethroid insecticide deltamethrin. Furthermore, oil dosage increments proportionately decreased the growth rate and reduced the losses in bean weight caused by cowpea weevils, and offspring emergence was almost abolished when parents were exposed to the LD20 of each essential oil. Finally, significant oviposition impairments were perceived only in couples where females were exposed (i.e., females exposed and exposed couples) to the LD20 of cinnamon and clove essential oils. Thus, by exhibiting similar insecticidal activities as synthetic insecticides and by significantly affecting the oviposition of sublethally exposed C. maculatus females, the cinnamon and clove essential oils represent valuable tools with potential of integration into the management of C. maculatus infestations.
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Affiliation(s)
- Luis Oswaldo Viteri Jumbo
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Embrapa Tabuleiros Costeiros, Aracaju, SE, Brazil
| | - Khalid Haddi
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- * E-mail: (KH); (EEO)
| | - Lêda Rita D. Faroni
- Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Fernanda F. Heleno
- Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Frederico G. Pinto
- Departamento de Química, Universidade Federal de Viçosa, Campus Rio Paranaíba, MG, Brazil
| | - Eugênio E. Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- * E-mail: (KH); (EEO)
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Brevik K, Lindström L, McKay SD, Chen YH. Transgenerational effects of insecticides-implications for rapid pest evolution in agroecosystems. CURRENT OPINION IN INSECT SCIENCE 2018; 26:34-40. [PMID: 29764658 DOI: 10.1016/j.cois.2017.12.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/05/2017] [Accepted: 12/27/2017] [Indexed: 06/08/2023]
Abstract
Although pesticides are a major selective force in driving the evolution of insect pests, the evolutionary processes that give rise to insecticide resistance remain poorly understood. Insecticide resistance has been widely observed to increase with frequent and intense insecticide exposure, but can be lost following the relaxation of insecticide use. One possible but rarely explored explanation is that insecticide resistance may be associated with epigenetic modifications, which influence the patterning of gene expression without changing underlying DNA sequence. Epigenetic modifications such as DNA methylation, histone modifications, and small RNAs have been observed to be heritable in arthropods, but their role in the context of rapid evolution of insecticide resistance remain poorly understood. Here, we discuss evidence supporting how: firstly, insecticide-induced effects can be transgenerationally inherited; secondly, epigenetic modifications are heritable; and thirdly, epigenetic modifications are responsive to pesticide and xenobiotic stress. Therefore, pesticides may drive the evolution of resistance via epigenetic processes. Moreover, insect pests primed by pesticides may be more tolerant of other stress, further enhancing their success in adapting to agroecosystems. Resolving the role of epigenetic modifications in the rapid evolution of insect pests has the potential to lead to new approaches for integrated pest management as well as improve our understanding of how anthropogenic stress may drive the evolution of insect pests.
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Affiliation(s)
- Kristian Brevik
- Department of Plant and Soil Science, University of Vermont, Burlington, VT, USA.
| | - Leena Lindström
- Department of Biological and Environmental Science, University of Jyväskylä, Finland
| | - Stephanie D McKay
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, VT, USA
| | - Yolanda H Chen
- Department of Plant and Soil Science, University of Vermont, Burlington, VT, USA
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Garcia-Reyero N. The clandestine organs of the endocrine system. Gen Comp Endocrinol 2018; 257:264-271. [PMID: 28822775 DOI: 10.1016/j.ygcen.2017.08.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 08/13/2017] [Accepted: 08/15/2017] [Indexed: 12/18/2022]
Abstract
This review analyzes what could be regarded as the "clandestine organs" of the endocrine system: the gut microbiome, the immune system, and the stress system. The immune system is very closely related to the endocrine system, with many intertwined processes and signals. Many researchers now consider the microbiome as an 'organ' that affects the organism at many different levels. While stress is certainly not an organ, it affects so many processes, including endocrine-related processes, that the stress response system deserved a special section in this review. Understanding the connections, effects, and feedback mechanisms between the different "clandestine organs" and the endocrine system will provide us with a better understanding of how an organism functions, as well as reinforce the idea that there are no independent organs or systems, but a complex, interacting network of molecules, cells, tissues, signaling pathways, and mechanisms that constitute an individual.
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Affiliation(s)
- Natàlia Garcia-Reyero
- Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS 39180, United States.
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Ali E, Liao X, Yang P, Mao K, Zhang X, Shakeel M, Salim AMA, Wan H, Li J. Sublethal effects of buprofezin on development and reproduction in the white-backed planthopper, Sogatella furcifera (Hemiptera: Delphacidae). Sci Rep 2017; 7:16913. [PMID: 29209084 PMCID: PMC5717270 DOI: 10.1038/s41598-017-17190-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 11/23/2017] [Indexed: 11/24/2022] Open
Abstract
In the present study, the effects of sublethal concentrations of buprofezin on life-table traits of S. furcifera were evaluated for two consecutive generations (F0 and F1). Our results exhibited that the fecundity, life span (longevity) and hatchability of the F0 and F1 generations were significantly decreased at LC30 compared to the control. However, copulation was not significantly affected for the F0 or F1 generations at sublethal concentrations. The female life span was affected negatively at both treatments in F0 and at LC30 in F1, compared to the control. Furthermore, significant effects of the sublethal concentrations were found on the developmental rate of all instars except the 3rd instar of F1. However, the pre-adult period, total pre-oviposition period (TPOP) and adult pre-oviposition period (APOP) significantly increased in F1 individuals at LC30 and LC10 compared to the control. Our findings revealed that demographic characters (survival rate, intrinsic rate of increase (ri), finite rate of increase (λ), net reproductive rate (R0), and gross reproductive rate (GRR)) of the F1 generation (from F0 parents) significantly decreased compared to the untreated group; however, the generation time (T) increased at LC10. Therefore, the results suggested that buprofezin could adversely affect individuals in the successive generation.
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Affiliation(s)
- Ehsan Ali
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Xun Liao
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Peng Yang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Kaikai Mao
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Xiaolei Zhang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Muhammad Shakeel
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Abdalla M A Salim
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Hu Wan
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China.
| | - Jianhong Li
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
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Cutler GC, Guedes RNC. Occurrence and Significance of Insecticide-Induced Hormesis in Insects. ACS SYMPOSIUM SERIES 2017. [DOI: 10.1021/bk-2017-1249.ch008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- G. Christopher Cutler
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, P.O. 550, Truro, Nova Scotia, Canada, B2N 5E3
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil, 36570-000
| | - Raul N. C. Guedes
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, P.O. 550, Truro, Nova Scotia, Canada, B2N 5E3
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil, 36570-000
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Chen X, Ma K, Li F, Liang P, Liu Y, Guo T, Song D, Desneux N, Gao X. Sublethal and transgenerational effects of sulfoxaflor on the biological traits of the cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae). ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:1841-1848. [PMID: 27670668 DOI: 10.1007/s10646-016-1732-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/15/2016] [Indexed: 06/06/2023]
Abstract
Sulfoxaflor is a novel insecticide belonging to sulfoximine chemical class that can be used to control sap-feeding insects, notably Aphis gossypii Glover. In addition to its acute toxicity, it is also important to consider the possible sublethal effects when establishing a comprehensive understanding of the toxicity of a new insecticide. We assessed the effects of a low lethal concentration (LC25) of sulfoxaflor on biological parameters of A. gossypii adults (F0) and subsequent transgenerational effects, i.e., on the progeny (F1 generation). The data were analyzed using an age-stage life table procedure. The results showed that the longevity and fecundity were not significantly affected by the LC25 of sulfoxaflor in the F0 or F1 generations. In addition, no significant differences were observed on the developmental time of each instar, the adult pre-oviposition period, and on the longevity of F1 individuals. However, the duration of their pre-adult stage and total pre-oviposition period, as well as their mean generation time were significantly increased. These observed effects affected aphid demographic traits; the survival rate, the intrinsic rate of increase (r i ), the finite rate of increase (λ), the net reproductive rate (R0), and the gross reproduction rate (GRR) of the F1 individuals (i.e., from F0 mothers) were significantly lower compared to the control. Our results showed that sublethal effects of sulfoxaflor significantly slowed down A. gossypii population growth; they indicated that effects of sulfoxaflor might be increased (beyond lethal effect) through sublethal effects when concentrations decreased in sulfoxaflor-treated areas after initial application in field.
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Affiliation(s)
- Xuewei Chen
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Kangsheng Ma
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Fen Li
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Pingzhuo Liang
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Ying Liu
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Tianfeng Guo
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Dunlun Song
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Nicolas Desneux
- INRA (French National Institute for Agricultural Research), University of Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, Sophia Antipolis, 06903, France.
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China.
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