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近年来,春玉米面积不断压缩,一代玉米螟在棉田的危害逐年加重,已成为棉花的主要害虫之一。1984年调查,一般棉株被害率10%左右,重者可达30%。玉米螟幼虫钻蛀棉茎后,防治困难。加之发生危害正值入夏农忙季节,常因用药失时而受害。为了摸索对钻蛀后幼虫的防治方法,我们根据甲胺
In recent years, the area of spring maize continues to be reduced. The harm of the first generation of corn borer in the cotton field has been increasing year by year, and has become one of the major pests of cotton. Survey in 1984, the general cotton plant damage rate of about 10%, severe cases up to 30%. Corn borer larvae after drilling cotton stems, prevention and treatment difficulties. Coupled with the occurrence of harm to positive agricultural summer season, often because of medication lost time. In order to explore the prevention and treatment of post-moth larvae, we based on methylamine