菜豆蛇潜蝇Ophiomyia phaseoli(Tryon)是为害豆类茎秆的害虫,在我国南方大豆产区均有分布。过去采用超低容量喷雾,常用药剂有40％乐果、50％杀螟松、50％马拉硫磷、50—70％辛硫磷等,每亩用药量为50—70毫升;或以上药剂的乳油稀释1,000倍,作叶面常规喷雾,效果良好。但大豆幼苗对药剂敏感,稍不慎,上列药 Ophiomyia phaseoli (Tryon) is a pest that affects the stalks of legumes and is distributed in the southern soybean producing areas of our country. The past use of ultra-low volume spray, commonly used agents 40% dimethoate, 50% fenitrothion, 50% malathion, 50-70% phoxim, 50-70 ml per acre; or more agents Of emulsifiable concentrate diluted 1,000 times for conventional foliar spray, the effect is good. However, soybean seedlings sensitive to the drug, a little careless, the above drugs