多年来棉田病虫防治上单纯依靠化学农药,致使天敌数量锐减,病虫抗药性增强,甚至越施药,病虫发生越严重。其实棉田害虫的天敌比较多,要善待它们,以发挥这些捕虫能手的作用。 Over the years cotton pest control rely solely on chemical pesticides, resulting in a sharp decline in the number of natural enemies, pest resistance increased, and even more drug application, the more serious pests. In fact, there are more natural enemies of cotton pests, we should treat them in order to play the role of these insect catcher.