昆虫的远距离迁飞是种内的一种遗传性,江苏农学院植保系根据迁飞昆虫一般发生在成虫“羽化幼期”后期的特性(指雌虫),对稻纵卷叶螟雌蛾生殖器管进行季节性系统解剖,并配合发生期、发生量符合程度和大区域内同期突增现象分析,可以看出稻纵卷叶螟有远距离迁飞的特性。研究结果认为江苏东台地区有外来虫源和本地虫源,按其情况有四种情况:全部由外地迁入(二代一峰、二代二峰日以后)、部分由外地迁入(二代二峰始盛期、三代一峰前期)、土生土长(三代二峰、四代一峰)和大部迁出(四代二峰)。其根据如 Insect long-distance migration is a species within the genetic, Jiangsu Agricultural College Plant Protection Department in accordance with migratory insects generally occur in adult “feathering” the late characteristics (referring to female), the rice leafroller female moth Genital duct seasonal systematic anatomy, and with the occurrence, the occurrence of coincidence degree and the phenomenon of sudden surge in the same area over the same period, we can see the rice leaf roller has long-distance characteristics of migratory. The results show that there are four kinds of external and local insect sources in Dongtai, Jiangsu Province. According to their situation, there are four situations: all are migrated from the outside (second generation and second generation) Peak period, the first generation of three generations of a peak), native (third generation two peaks, four generations of a peak) and most of the emigration (fourth generation two peak). According to such as