A combination of pesticides and biological control agents is frequently necessary to achieve successful pest management requiring the assessment of their compatibility for the intended purpose. Aphidius flaviventris Kurdjumov is one of the parasitoids of the cotton aphid Aphis gossypii Glover, whose susceptibility to pesticides was not yet investigated. Accordingly, we investigated the lethal and sublethal effects of the commonly utilized insecticide mixture thiacloprid + deltamethrin on the cotton aphid and its parasitoid wasp Aphidius flaviventris. The estimated LC50 for the aphid was 14.1 mg ai/l; the effects of sublethal exposure at LC10 (2.80 mg ai/l) and LC30 (7.28 mg ai/l) on the aphid life-table parameters led to significantly increase on the development time of third- and fourth-instar nymphs and preadult. Sublethal exposure to the insecticide mixture compromised aphid longevity, fecundity, and life-table parameters (r, R0, and T). Moreover, population growth and parasitism rate of the parasitoid were significantly compromised at both concentrations of the insecticide mixture under sublethal exposure. These results not only indicate the efficacy of thiacloprid + deltamethrin against the cotton aphid, but also raise concerns regarding its negative impacts on the parasitoid Aphidius flaviventris and caution against its use in pest management programs.

中文翻译：

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噻虫啉 + 溴氰菊酯对棉蚜、棉蚜（半翅目：蚜科）和寄生蜂、黄蚜（膜翅目：蚜科）生命表参数的影响

杀虫剂和生物控制剂的组合通常是实现成功的害虫管理所必需的，需要评估它们对预期目的的相容性。Aphidius flaviventris Kurdjumov 是棉蚜 Aphis gossypii Glover 的寄生蜂之一，其对杀虫剂的敏感性尚未得到调查。因此，我们研究了常用的杀虫剂混合物噻虫啉 + 溴氰菊酯对棉蚜及其寄生蜂黄蚜蚜的致死和亚致死作用。蚜虫的估计 LC50 为 14.1 mg ai/l；LC10 (2.80 mg ai/l) 和 LC30 (7.28 mg ai/l) 的亚致死暴露对蚜虫生命表参数的影响导致三龄和四龄若虫和前成虫的发育时间显着增加。对杀虫剂混合物的亚致死暴露会影响蚜虫的寿命、繁殖力和生命表参数（r、R0 和 T）。此外，在亚致死暴露下，两种浓度的杀虫剂混合物都显着降低了拟寄生物的种群增长和寄生率。这些结果不仅表明噻虫啉 + 溴氰菊酯对棉蚜的功效，而且还引起人们对其对寄生蜂蚜虫的负面影响的担忧，并警告不要将其用于害虫管理计划。