过去用40％乐果乳剂的1,000倍液喷雾防治高粱蚜,由于浓度低、液量多,往往费工大而防治效果差,造成了严重减产。1972年我站与四女寺公社辛桥庄大队一起试验成功高浓度乐果快速喷雾的方法,1973年在全县推广,防治面积达2万亩,取得良好效果,深受群众欢迎。 Past use of 40% dimethoate spray 1,000 times prevention and control of sorghum aphids, due to the low concentration, liquid volume, often cost large and poor control effect, resulting in a serious cut. In 1972, I stood with Sin Qiaozhuang Brigade of Si Nisi Temple Commune to test the successful spraying method of high concentration of dimethoate. In 1973, it was popularized throughout the county with a control area of ​​20,000 mu and achieved good results, which was well received by the masses.