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Insecticide-mediated effects on mating success and reproductive output of Drosophila suzukii

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Abstract

Exposure to sublethal concentrations can have adverse effects on certain individuals, but, can also favor survival and reproduction of others. This study aimed to evaluate the effects of exposing Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae) adults to LC50 of spinetoram and lambda-cyhalothrin and field rate of thiamethoxam on their mating, reproductive output and longevity. The LC50 for lambda-cyhalothrin and for spinetoram were 7.83 and 32.91 ng a.i./cm2, respectively. Thiamethoxam, in the concentrations tested, was not toxic to D. suzukii, therefore, we use the recommended concentration for strawberry, 231.25 ng a.i./cm2, in the sublethal tests. Insects exposed to LC50 of lambda-cyhalothrin were more likely to mate, but presented shorter copula. Sublethal exposure to thiamethoxam lead to an increase in total fecundity. Among the insecticides tested, spinetoram presented the least expressive effects. Longevity was not affected by any of the tested insecticides. Results presented in this study are relevant to D. suzukii management since the stimulatory effects shown on this pest species can collaborate to outbreaks and insecticide resistance.

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All data generated or analyzed during this study are included in this manuscript.

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Acknowledgements

The authors appreciate the financial support provided by the National Council of Scientific and Technological Development (CNPq) and the Higher Education Improvement Coordination (CAPES; finance code 001).

Funding

Partial financial support was received from National Council of Scientific and Technological Development (CNPq) and the Higher Education Improvement Coordination (CAPES; finance code 001).

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APK, TS, ACP, and JBP conceived the research. APK, TS, ACP, and JBP conducted experiments. APK and ACP analyzed data and conducted statistical analyses. APK, ACP, and JBP wrote the manuscript-original draft. DB, ADG, DEN, and FRMG wrote the manuscript- review and editing. DB, ADG, DEN, and FRMG secured funding. All authors read and approved the manuscript.

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Correspondence to Alexandra P. Krüger.

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The authors declare no competing interests.

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Krüger, A.P., Scheunemann, T., Padilha, A.C. et al. Insecticide-mediated effects on mating success and reproductive output of Drosophila suzukii. Ecotoxicology 30, 828–835 (2021). https://doi.org/10.1007/s10646-021-02402-9

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  • DOI: https://doi.org/10.1007/s10646-021-02402-9

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