建国三十多年来,我省广大棉农在和病虫害作斗争中,积累了不少经验,取得了很大成绩,特别是从有机氯和有机磷农药大量推广以后,对于控制棉虫为害,确保棉花增产,起了很大的作用。但是,随着化学农药的长期大量使用,也带了一些不良影响:一是农药对环境造成污染,日益引起人们的注意;二是某些害虫对常用农药逐渐产生了抗药性;三是农药杀伤了大量有益生物,导致有些害虫由于天敌减少而为害加重;四是有 In the thirty years since the founding of New China, most cotton farmers in our province have accumulated a great deal of experience in the fight against pests and diseases and achieved great success. In particular, after extensive promotion of organochlorine and organophosphate pesticides, Cotton yield, played a big role. However, with the long-term mass use of chemical pesticides, but also brought some adverse effects: First, pesticides cause environmental pollution, an increasing concern; second is that some pests on the common pesticide gradually developed resistance; third pesticide kill A large number of beneficial organisms, resulting in some pests reduced as natural enemies harm worse; Fourth, there