本文报道了近年来对一些常用杀虫剂的毒力测定结果,并对今年棉铃虫猖獗发生,造成棉花大面积减产的原因进行了分析。从毒力、抗药性、害虫为害特点等方面论述了防治主要棉虫的最佳农药品种,施药技术等,并介绍了作者防治棉铃虫的成功经验和防治棉铃虫幼虫的最佳复配制剂881. This paper reports the results of the virulence tests of some commonly used insecticides in recent years and analyzes the causes of cotton bollworm rampant this year, resulting in a large area of ​​cotton yield reduction. From the aspects of virulence, drug resistance and pest damage, the author discussed the best pesticide varieties and application techniques for controlling the main cotton insects, and introduced the author’s successful experience in controlling cotton bollworm and the best compound preparation for controlling cotton bollworm larvae 881.