在室内研究了转 BT基因棉对初孵、2、3龄棉铃虫幼虫取食行为的影响。结果表明 :低龄幼虫在 BT棉上取食时间明显减少 ,吐丝下垂和静息时间明显延长 ,而爬行时间差异不显著。棉铃虫取食行为的变化使得棉株的受害程度减轻 ,同时由于暴露时间增加 ,有利于天敌的寄生与捕食 The effects of BT transgenic cotton on the feeding behavior of newly hatched and 2nd instar larvae of Helicoverpa armigera were studied indoors. The results showed that the feeding time of young larvae on BT cotton was significantly reduced, and the sagging and resting time of silking was significantly prolonged, while the crawling time was not significantly different. Changes in feeding behavior of cotton bollworm make cotton plant damage reduced, at the same time due to increased exposure time, is conducive to natural enemies of parasitic and predation