棉铃虫是棉花的重要害虫,往往造成棉花蕾、铃脱落,严重影响棉花的产量和品质。棉农为了控制其为害,往往使用毒性较高的农药或多种农药混用,这既提高了生产成本,而且在高选择压下导致棉铃虫对多种农药产生了抗药性,防效下降,进而加剧了农业生态环境污染,甚至生产中毒事故的发生? Cotton bollworm is an important pest of cotton, often resulting in cotton buds, bell off, seriously affecting the yield and quality of cotton. In order to control their damage, cotton farmers often use more toxic pesticides or a variety of pesticides mixed, which not only increases the production cost, but also causes the cotton bollworm to have resistance to various pesticides under the high selection pressure, thus the anti-efficacy decreases and further aggravates Agro-ecological environment pollution, and even the occurrence of poisoning accidents?