State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China; Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, Henan, China.
Pestic Biochem Physiol. 2024 Sep;204:106061. doi: 10.1016/j.pestbp.2024.106061. Epub 2024 Jul 31.
Aphis gossypii Glover is one of the most agriculturally important phloem-feeding economic pests, causing tremendous loss in crop yield annually. The hormesis is an important cause of A. gossypii resistance formation, population resurgence, and re-outbreak. However, whether the hormesises induced by different insecticides interact mutually remain largely unclear. In the study, four-generation A. gossypii experiment found that the 24-h sublethal-dose (LC) sulfoxaflor treatment on G0 significantly increased the net reproductive rate (R0) and fecundity of G1 and G2 generation A. gossypii, but it did not significantly affect the fecundity of G3 and G4 individuals. Transcriptomic analyses revealed that the insecticide-induced significant up-regulation of pathways ribosome, energy metabolism, and the DNA replication and reparation might be responsible for the enhancement of fecundity in G1 and G2 A. gossypii. Notably, G0 exposure to LC sulfoxaflor followed by G1 exposure to LC deltamethrin resulted in a stronger reproductive stimulation than sulfoxaflor or deltamethrin exposure alone. Our findings provide valuable reference for optimizing sulfoxaflor application in integrated pest management strategies.
棉蚜是最重要的农业刺吸式经济害虫之一，每年都会对作物产量造成巨大损失。胁迫是棉蚜产生抗性、种群复苏和再次爆发的重要原因。然而，不同杀虫剂诱导的胁迫是否相互作用还很大程度上不清楚。在这项研究中，通过对四代棉蚜进行实验发现，G0 代经 24 小时亚致死剂量（LC）的氟啶虫酰胺处理显著增加了 G1 和 G2 代棉蚜的净生殖率（R0）和生育力，但对 G3 和 G4 个体的生育力没有显著影响。转录组分析表明，杀虫剂诱导的核糖体、能量代谢以及 DNA 复制和修复途径的显著上调可能是 G1 和 G2 代棉蚜生育力增强的原因。值得注意的是，G0 代经 LC 氟啶虫酰胺处理后，G1 代再经 LC 溴氰虫酰胺处理，比单独接触氟啶虫酰胺或溴氰虫酰胺产生更强的生殖刺激作用。我们的研究结果为优化氟啶虫酰胺在综合害虫管理策略中的应用提供了有价值的参考。
