Departamento de Engenharia Florestal/BIOAGRO, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil.
Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil.
Environ Sci Pollut Res Int. 2021 Nov;28(41):57449-57458. doi: 10.1007/s11356-021-14589-9. Epub 2021 Jun 5.
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 (LC) of Bacillus thuringiensis (Bt), permethrin, tebufenozide, and thiamethoxam. Moreover, midgut histopathology of P. nigrispinus fed with preys treated with LC 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.
林业中防治食叶性毛毛虫的方法包括使用杀虫剂和释放捕食性昆虫姬蜂，但是一些化合物可能会影响非目标天敌，需要进行风险评估。本研究调查了用苏云金芽孢杆菌（Bt）、氯菊酯、虫酰肼和噻虫嗪的致死浓度（LC）处理过的猎物喂养的黑带食虫虻成虫的生存、偏好和捕食情况。此外，还研究了用每种杀虫剂的 LC 处理过的猎物喂养的黑带食虫虻的中肠组织病理学。Bt、氯菊酯和噻虫嗪会降低黑带食虫虻的生存能力和捕食能力，而用这些化学物质污染的猎物喂养的黑带食虫虻。然而，包括虫酰肼在内的这四种测试杀虫剂会导致黑带食虫虻中肠腔中上皮结构不规则、细胞质空泡化和细胞碎片释放等组织学变化。Bt、氯菊酯、虫酰肼和噻虫嗪对天敌的亚致死效应表明，在与黑带食虫虻一起用于林业害虫综合治理时，应更好地评估它们的使用。
