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棉田天敌在控制棉蚜,棉铃虫等棉花害虫方面起着重要的作用。然而多年来很多农户滥用杀虫剂,大量杀伤了棉田天敌,使天敌未能发挥应有的作用,导致害虫的再猖獗,这样,既加大了化防压力,又污染了环境,增强了害虫抗性,使防治工作陷入恶性循环。为了有效地保护利用天敌,我们将棉田常用的几种杀虫剂对天敌的杀伤作用进行了田间试验,以期探讨农药的合理使用方法,尽可能降低对天敌的杀伤作用。
Natural enemies of cotton in the control of cotton aphids, cotton bollworm and other cotton pests play an important role. However, many farmers over the years abuse of insecticides, killing a large number of natural enemies of cotton so that natural enemies failed to play their due role, leading to the re-rampant pests, so that not only increased the pressure on prevention and control, but also pollutes the environment and enhance pests Resistant, so that prevention and control work into a vicious circle. In order to effectively protect and utilize natural enemies, we conducted field experiments on the killing effects of several insecticides commonly used in cotton fields on natural enemies in order to explore the rational use of pesticides and minimize the killing effect on natural enemies.