稻飞虱是水稻后期的重要害虫。稻虱缨小蜂是稻飞虱卵的重要天敌,其寄生率可达20～50％。1982～1983年夏秋我们在江苏东台县弶港农场直播稻田对稻虱缨小蜂的发生、消长和生活习性作了调查和观察,结果如下。一、种类和性比稻虱缨小蜂有三种:稻虱缨小蜂 Anagrus sp,稻虱黄缨小蜂Anagrus sp,黑腹缨小蜂Anagrus sp。三种缨小蜂中以稻虱缨小蜂数量最多。7至9月 Planthopper is an important late pest in rice. Parasitoid louse is an important natural enemy of rice planthopper eggs, its parasitism rate of up to 20 to 50%. From 1982 to 1983, summer and autumn, we surveyed and observed the occurrence, growth and life habits of the small-l wasps in the direct-seeded rice fields at the Hong Kong farms in Dongtai, Jiangsu Province. The results are as follows. First, the species and sex There are three kinds of small louse beetle: Anaphalis Anagrus sp., Anaphalis yellow Antelope sp., Anagrus sp. The number of wasps in the three species of small bees is the largest. July to September