寄主植物影响害虫药剂敏感性的研究进展

害虫取食不同寄主植物后，对杀虫剂的反应可归为3类：敏感性降低、增高和无明显变化。害虫对药剂的敏感性变化与不同植物中次生物质诱导激活/抑制昆虫体内相关解毒酶活性有关。这种诱导作用可受到植物营养、次生物质种类及其含量分布、害虫种类与发育阶段、以及环境温度等多种因素影响。经诱导的昆虫解毒酶对不同类型杀虫剂的代谢能力并不相同，进而导致对不同药剂的敏感性变化有明显差异。解毒酶系的诱导激活在害虫抗药性形成早期被认为有利于提高隐性抗性基因频率，从而可促进害虫抗药性的发展。最后，就寄主植物影响害虫对药剂敏感性在害虫治理中的应用作了探讨。

Advances in the studies on the effects of host plants on insect susceptibility to insecti-cides

When insect pests were fed with different host plants, the susceptibility to insecticides would decrease, increase or be unchanged. These changes were related to the activation or inhibition of insect detoxifying enzymes induced by plant allelochemicals, while the induction levels were influenced by some factors such as plant nutrients, structures and distributions of allelochemicals, species and development stages of insects as well as the temperature. The metabolic abilities of induced detoxifying enzymes for the insecticides varied with the types of insecticides, resulting in the variations of insect susceptibility to different insecticides. It was recognized that the induced activation of insect detoxifying enzymes would enhance the frequency of the recessive resistance gene, and would promote the development of insecticide resistance at the early stages. Finally, the effects of host plant on insecticide susceptibility applied in pest management were discussed.