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Exposure to insecticides causes effects on survival, prey consumption, and histological changes in the midgut of the predatory bug, Podisus nigrispinus (Hemiptera: Pentatomidae)

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Abstract

The control of defoliating caterpillars in forestry includes the use of insecticides and releases of the predatory bug Podisus nigrispinus, but some compounds may affect non-target natural enemies, which need evaluation of risk assessment. This research investigates the survival, preference, and prey consumption of P. nigrispinus adults fed with prey treated with the lethal concentration (LC50) of Bacillus thuringiensis (Bt), permethrin, tebufenozide, and thiamethoxam. Moreover, midgut histopathology of P. nigrispinus fed with preys treated with LC50 of each insecticide was investigated. The insecticides Bt, permethrin, and thiamethoxam reduce the survival and the prey consumption in P. nigrispinus fed with preys contaminate with these chemicals. However, the four tested insecticides, including tebufenozide, cause histological changes such as irregular epithelial architecture, cytoplasm vacuolization, and release of cell fragments in the midgut lumen of P. nigrispinus. The sublethal effects of Bt, permethrin, tebufenozide, and thiamethoxam to the natural enemy suggest that they should be better evaluated to be used together with P. nigrispinus for integrated pest management in forestry.

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All data generated or analyzed during this study are included in this published article (and its Supplementary information files).

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Funding

To the Brazilian agencies “Conselho Nacional de Desenvolvimento Científico e Tecnológico” (CNPq), “Coordenação de Aperfeiçoamento de Pessoal de Nível Superior” (CAPES), “Fundação de Amparo à Pesquisa do Estado de Minas Gerais” (FAPEMIG), and the “Programa Cooperativo sobre Proteção Florestal” (PROTEF) to “Instituto de Pesquisas e Estudos Florestais” (IPEF) for scholarships and financial support.

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Wiane Silva, Luis Martínez, and Angelica Plata-Rueda: conceptualization, methodology, and analysis. Wiane Silva: data curation and writing - original draft. Luis Martínez: sampling and software. Luis Martínez, José Serrão, and José Zanuncio: supervision and writing-reviewing and editing.

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Correspondence to Wiane Meloni Silva.

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The authors declare no competing interests.

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Responsible Editor: Giovanni Benelli

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Silva, W.M., Martínez, L.C., Plata-Rueda, A. et al. Exposure to insecticides causes effects on survival, prey consumption, and histological changes in the midgut of the predatory bug, Podisus nigrispinus (Hemiptera: Pentatomidae). Environ Sci Pollut Res 28, 57449–57458 (2021). https://doi.org/10.1007/s11356-021-14589-9

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  • DOI: https://doi.org/10.1007/s11356-021-14589-9

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