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褐飞虱(Nilaparvata lugens St？l，Homoptera: Delphacidae)是一种重要的水稻害虫，可以直接取食或将病菌和病毒传给水稻，从而给粮食生产带来巨大损失。目前，由于能克服寄主抗性的新褐飞虱致害性种群出现，导致其危害越来越严重。研究褐飞虱致害性遗传变异规律对于抗性品种的选育与应用具有很重要的意义。本文就褐飞虱致害性种群的田间发生情况，鉴定方法，遗传分析，分子生物学和内共生菌等方面进行了阐述。Brown planthopper (Nilaparvata lugens St？l) (Homoptera: Delphacidae) is economically impor- tant pest on rice that feed directly or serve as vectors of pathogenic microorganisms and viruses to crops, re- sulting in significant damage and yield losses for farmers. In recent decades, brown planthopper has become notorious due to the emergence of new, virulent populations that can overcome host resistance. Thus, it is important to study virulent variation of the brown planthopper for the breeding and applying of resistant rice varieties. In this study, I review that the virulent population of brown planthopper distributed in rice fields and that the other content included the method of identification, the analysis of genetic basis, molecular boil- ogy and the relation of virulence with symbionts.