The green peach aphid, Myzus persicae (Sulzer) is a significant global pest of a broad range of horticultural and grain crops. Control of M. persicae is primarily dependent on insecticides, however, this species has a high propensity to evolve insecticide resistance and has evolved resistance to over 80 insecticides from various chemical groups worldwide. In Australia, widespread resistance to carbamates, organophosphates, pyrethroids and neonicotinoids in M. persicae populations is commonplace. Given the ability of M. persicae to establish resistance to new chemistries quickly, programs are needed to monitor susceptibility to new insecticides before their widespread use. In this study, we used leaf-dip bioassays to generate sensitivity data and investigate potential cross-resistance in multiple field-collected populations of Australian M. persicae to two recently registered insecticides, flonicamid and afidopyropen. After 144 and 168 h exposure, we found little variation in the susceptibility of M. persicae populations to either flonicamid or afidopyropen, and no evidence of sensitivity shifts in the field. Additionally, there was no evidence of cross-resistance between flonicamid or afidopyropen and multiple known resistance mechanisms for carbamate, pyrethroid, organophosphate and neonicotinoid insecticides. The sensitivity data generated in this study prior to the evolution of field resistance provides a useful starting point for future resistance monitoring, and allows for the development and implementation of insecticide resistance management strategies which should prolong the long-term efficacy of flonicamid and afidopyropen against M. persicae.

桃蚜( Myzus persicae ) (Sulzer) 是一种严重的全球性害虫，危害广泛的园艺和粮食作物。M. persicae的控制主要依赖于杀虫剂，然而，该物种具有高度进化出杀虫剂抗性的倾向，并且已经进化出对来自全球各种化学组的 80 多种杀虫剂的抗性。在澳大利亚，桃蚜种群对氨基甲酸酯、有机磷酸酯、拟除虫菊酯和新烟碱类的广泛耐药性是司空见惯的。鉴于M. persicae的能力为了迅速建立对新化学物质的抗药性，需要在新杀虫剂广泛使用之前监测其对新杀虫剂的敏感性。在这项研究中，我们使用浸叶生物测定法来生成敏感性数据，并调查澳大利亚桃蚜的多个田间采集种群对两种最近注册的杀虫剂氟啶虫胺和非吡唑啉的潜在交叉抗性。暴露 144 和 168 小时后，我们发现M. persicae的敏感性几乎没有变化人群对氟啶虫胺或 afidopyropen 的影响，并且没有证据表明该领域的敏感性发生变化。此外，没有证据表明氟啶虫胺或 afidopyropen 与氨基甲酸酯、拟除虫菊酯、有机磷酸酯和新烟碱类杀虫剂的多种已知耐药机制之间存在交叉耐药性。本研究中在田间抗性演变之前产生的敏感性数据为未来抗性监测提供了一个有用的起点，并允许制定和实施杀虫剂抗性管理策略，该策略应延长氟啶虫胺和 afidopyropen 对M .桃花