农业自实行生产费任制以来,棉农多以户为单位植棉,因受科技水平和经济力量的限制,在棉虫的防治上,往往长期单一使用一种农药和盲目加大用药浓度,致使害虫抗药性猛增,大量天敌被杀伤,不仅害虫难以根治,而且污染了环境,破坏了生态平衡,加大了生产成本。针对棉花生产中普遍存在的治 Agriculture since the implementation of the production fee system, cotton growers to households more cotton, due to science and technology and economic constraints, in the prevention and control of cotton insects, often single long-term use of a pesticide and blindly increase drug concentration, resulting in Insecticide resistance soared, a large number of natural enemies were killed, not only difficult to cure pests, but also pollute the environment, undermining the ecological balance and increased production costs. Against the prevailing treatment of cotton production