Pesticide immunotoxicity on insects – Are agroecosystems at risk?

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 175467 - 175467

Опубликована: Авг. 16, 2024

Recent years have witnessed heightened scrutiny of the non-target sublethal effects pesticides on behavioural and physiological traits insects. Traditionally, attention has focused investigating pesticides' primary modes action, often overlooking potential secondary mechanisms. This review brings forth nuanced impacts pesticide exposure immune system target insect species. Pesticides, such as for example neonicotinoids, suppress response, while others, like certain organophosphates some growth regulators (IGRs), appear to bolster immunocompetence under circumstances. Beyond their individual impacts, synergic mixtures immunity are garnering increasing interest. thus summarizes recent advances in immunomodulatory pesticides, detailing both mechanisms consequences interactions. The implications these ecosystem preservation viability beneficial organisms, pollinators natural enemies pests, discussed. also considers further research directions action explores integrated pest management (IPM) programs, several model organisms studied crop While current data provide an expansive overview how innate is modulated, concrete endpoints remain elusive requiring into actions.

Язык: Английский

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Compatibility of Bioinsecticides with Parasitoids for Enhanced Integrated Pest Management of Drosophila suzukii and Tuta absoluta

Insects, Год журнала: 2024, Номер 15(7), С. 467 - 467

Опубликована: Июнь 22, 2024

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Язык: Английский

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Non-target effects of neurotoxic insecticides on Ganaspis cf. brasiliensis, a classical biological control agent of the spotted wing Drosophila

CABI Agriculture and Bioscience, Год журнала: 2024, Номер 5(1)

Опубликована: Май 27, 2024

Abstract Background The spotted wing drosophila, Drosophila suzukii , is an invasive pest causing significant economic losses worldwide. Current control strategies mainly rely on insecticides, which negatively impact fruit marketability and the sustainability of integrated management (IPM) programs. In addition, pesticides can have dramatic consequences non-target species when persisting in environment at low concentrations after field applications. this context, chemical strongly interfere with releases G1 strain Asian larval parasitoid Ganaspis cf . brasiliensis currently adopted classical biological agent to manage D. infestations Methods Probit analysis was used assess baseline toxicity acetamiprid, cyazypyr, lambda-cyhalothrin, phosmet, spinosad G. adults through residual contact exposure laboratory. Then, adult parasitoids were exposed insecticide Lethal Concentrations (LC 5 LC 30 ) their mortality checked daily survival treated wasps. Results Lambda-cyhalothrin showed highest a 50 1.38 × 10 –3 g active ingredient (a.i.) /L, while cyazypyr seemed safer estimated 0.20 a.i./L without affecting sublethal doses. Spinosad phosmet significantly reduced wasp both lambda-cyhalothrin acetamiprid affected lifespan only Spinosad, caused major reductions, followed by least reduction 21.6% Conclusions Overall, study highlighted importance carefully selecting insecticides minimize adverse effects organisms. particular, most promising candidate integrate inoculative treatments. By contrast, application should be avoided alongside releases. Although less against than other tested molecules, it caution due its parasitoid. These results provide first evidence G cf. susceptibility order promote sustainable efficient strategies.

Язык: Английский

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Side effects of semi‐synthetic insecticide spinetoram on the whitefly parasitoid Encarsia formosa

Pest Management Science, Год журнала: 2024, Номер unknown

Опубликована: Сен. 28, 2024

Abstract BACKGROUND Insecticide risk assessment for biological control agents is essential implementing integrated pest management (IPM) programs. Spinetoram a naturally derived insecticide used to variety of agricultural sap‐sucking insect pests, and Encarsia formosa Gahan (Hymenoptera: Aphelinidae) plays key role in the biocontrol greenhouse whiteflies. Despite its presumed safe ecotoxicological profile, side effects spinetoram on E . are partially unknown, especially at sublethal doses. In laboratory, we estimated lethal concentrations (LC) E. by topical exposure pupae 48 h residual contact emerged adults. Afterwards, assessed impact LCs life history traits (juvenile development, adult longevity, parasitism, emergence) population growth parameter (the instantaneous rate increase, r i ) parasitoid. RESULTS Probit analysis allowed estimation LC 10 = 0.10 mg/L, 50 0.56 90 3.28 mg/L. had no observed parameters Conversely, significantly reduced longevity 19.2% 40.6%, total parasitism 33.4% 38.7%, emergence 29.6% 39.1%, respectively. Also, was affected with reduction 8.17 29.83%, CONCLUSION Our results suggested that threatens effectiveness when applied field recommended rate. However, further validation under conditions required comprehensive IPM © 2024 Society Chemical Industry.

Язык: Английский

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Assessment of non‐target toxicity of insecticides on Ganaspis brasiliensis (Ihering) in laboratory and field conditions

Pest Management Science, Год журнала: 2024, Номер 80(10), С. 5421 - 5431

Опубликована: Июль 12, 2024

Abstract Background G1 strain Ganaspis brasiliensis (Ihering) has been recently released in both Europe and America as a biological control agent of the spotted wing drosophila, Drosophila suzukii (Matsumura). In initial phases classical programs, it becomes imperative to evaluate susceptibility parasitoids insecticides, identify best alternatives adopt an integrated pest management organic perspective. this study, we evaluated lethal sublethal effects topical application five different insecticides classes: neonicotinoids, diamides, pyrethroids, organophosphates spinosyns. Additionally, tested residual toxicity field trials vineyards sweet cherry orchards. Results Adult wasps' insecticides' classes were consistent between laboratory field. Spinosad exhibited highest toxicity, with median concentration (LC 50 ) 0.00372 maximum dose, knock‐down effect trials, causing 92.5 ± 5% mortality at T 0 . λ‐cyhalothrin showed on male female insects' longevity when applied LC 30 deltamethrin persistence, significant parasitoid up 14 days after treatment. Conversely, cyantraniliprole was least toxic active ingredient according bioassays, even though its residues caused 7 treatment Conclusion Our results indicate that spinosad are highly G. , making them incompatible programs. Cyantraniliprole lower may be considered selective pesticide for D. suzukii. © 2024 The Author(s). Pest Management Science published by John Wiley & Sons Ltd behalf Society Chemical Industry.

Язык: Английский

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Four Neurotoxic Insecticides Impair Partner and Host Finding in the Parasitoid Leptopilina heterotoma and Bioactive Doses Can Be Taken up Via the Host

Journal of Chemical Ecology, Год журнала: 2025, Номер 51(1)

Опубликована: Янв. 29, 2025

Abstract In modern agriculture, control of insect pests is achieved by using insecticides that can also have lethal and sublethal effects on beneficial non-target organisms. Here, we investigate acute toxicity four the males’ sex pheromone response female host finding ability Drosophila parasitoid Leptopilina heterotoma . The nicotinic acetylcholine receptor antagonists acetamiprid, flupyradifurone sulfoxaflor, as well acetylcholinesterase inhibitor dimethoate were applied topically acetone solutions. Males treated with all no longer preferred in a T-olfactometer. Duration wing fanning, an element pheromone-mediated male courtship behavior, was reduced insecticides. females to orientate towards host-infested feeding substrate not affected acetamiprid tested dose range. However, treatment dimethoate, sulfoxaflor resulted loss females’ preference for odor. At lowest doses interfering olfactory abilities L. this study (acetamiprid: 0.21 ng, dimethoate: 0.105 flupyradifurone: 2.1 ng sulfoxaflor: ng), ≥ 90% wasps survive insecticide treatment. Male responses disturbed those had developed D. melanogaster larvae reared dimethoate-treated medium at levels. Hence, sufficient interfere chemical orientation be taken up via food chain.

Язык: Английский

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Potential interactions of larval and pupal drosophila parasitoids and their implications for biological control of Drosophila suzukii

Biological Control, Год журнала: 2025, Номер unknown, С. 105756 - 105756

Опубликована: Март 1, 2025

Язык: Английский

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Imidacloprid Resistance Challenges in Brazilian Strains of Drosophila suzukii (Diptera: Drosophilidae)

Insects, Год журнала: 2025, Номер 16(5), С. 494 - 494

Опубликована: Май 5, 2025

Drosophila suzukii (Matsumura) is a relevant pest affecting berries and stone fruits globally, including in the Neotropical region, where its invasion was reported about decade ago. Despite chemical control being main management method for D. suzukii, data on insecticide susceptibility populations are scarce. Here, we assessed of three field-collected Brazilian to four insecticides (i.e., deltamethrin, permethrin, spinetoram, imidacloprid) contrasted this with standard insecticide-susceptible population. Using discriminating concentration (LC90) from susceptible population, identified resistant populations. Synergist exposure (piperonyl butoxide, triphenyl phosphate, diethyl maleate) indicated role detoxification enzymes resistance. Our results showed that deltamethrin most toxic, followed by imidacloprid. While all field were similarly pyrethroids spinosyns, one population Minas Gerais Paula Candido) had significantly lower imidacloprid susceptibility, only 53.4 ± 5.2% mortality at 10.0 g/L (the equivalent 10-fold estimated LC90). Only piperonyl butoxide increased Candido flies. findings indicate occurrence cytochrome P450 enzyme-based resistance state Gerais, which can challenge Brazil.

Язык: Английский

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Enhancing the performance of Piper spp. essential oils by developing chitosan-sodium alginate polyelectrolyte complex against Drosophila suzukii with selectivity for non-target parasitoids

Journal of Pest Science, Год журнала: 2025, Номер unknown

Опубликована: Июнь 4, 2025

Язык: Английский

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How exposure to a neonicotinoid pesticide affects innate and learned close-range foraging behaviour of a classical biological control agent

Biological Control, Год журнала: 2024, Номер 196, С. 105568 - 105568

Опубликована: Июнь 28, 2024

While foraging in agricultural habitats, natural enemies, such as egg parasitoids, may encounter insecticide residues, which, if not lethal, can alter host location behaviour and learning capacity. Such interference reduce the potential of biological control agents, especially exotic species which are released small numbers a new environment first need to establish build up their populations. Several studies have investigated lethal effects pesticides on but less information is available about non-lethal consequences, no effect associative parasitoids. The parasitoid Trissolcus japonicus (Ashmed) (Hymenoptera: Scelionidae) agent invasive brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae). We hypothesised that low concentration (causing 20 % mortality) commonly used neonicotinoid (acetamiprid) alters capacity T. exploit chemical traces left by reproductive females either main host, H. halys, or an alternative Arma custos (F.) In open arena bioassays, responded positively both bug species. Following oviposition experience with (associative learning), reduced time. Parasitoids previously exposed showed changes behaviour, increased residence time spent host-contaminated area altered kinetics walking behaviour. Neonicotinoid exposition did affect ability 1 h after prolonged memory retention. female its this should be considered when attempting establishment introduction areas.

Язык: Английский

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