1964年,黑龙江省南部地区普遍发生了高粱蚜虫,为了迅速消灭蚜害,各地除采用原有的防治方法外,还积极推广了乐果喷雾和1059涂茎。由于过去缺乏使用乐果经验,我们以双城县太平公社先进大队为基点,进行了一些调查和试验工作,结果如下: 一、不同用药方法与药效的关系 1963年东宁县用乐果的3,000—5,000倍液大面 In 1964, sorghum aphid occurred in the southern Heilongjiang Province. In order to eliminate the aphid harm rapidly, all the places around the world used the original prevention and cure method, and also actively promoted the dimethoate spray and 1059 stalk. Due to the lack of the experience of using dimethoate in the past, we conducted some investigations and experiments based on the advanced unit of Taiping Gonggang in Shuangcheng County. The results are as follows: I. The Relationship between Different Drugs and Efficacy 1963 Dongding dimethoate 3,000 -5,000 times the liquid surface