杭州农药厂为了适应广大贫下中农的需要,试制成功一种消灭稻田蚂蝗的新药剂灭蛭灵。在江南广大水稻地区,蚂蝗为危十分普遍,浙江是较严重的地区。它不仅吸人鲜血,而且传染疾病,严重危及贫下中农、社员群众的身体健康,迫切需要防治。该厂工人同技术人员,经三年多的试验,研究成功灭蛭灵农药,经1969年在宁波、余杭、吴兴等地区大田试验效果很好,每亩用药0.4斤,防治效果达90％以上,是目前防治蚂蝗的高效药剂之一。这一药剂的有效成份为四乙基硫代焦磷酸酯,毒性较 Hangzhou Pesticide Factory in order to adapt to the needs of the majority of poor middle peasants, trial success of a new anti-leech Ling eliminate leech Ling. In the vast southern Yangtze River rice region, Le locust is very common, while Zhejiang is more serious. It not only absorbs blood, but also spreads diseases, seriously endangering the health of the poor and middle peasants and members of the masses and urgently needs prevention and treatment. The factory workers and technical staff, after more than three years of trial, the successful study of pesticides off Hirudo, in 1969 in Ningbo, Yuhang, Wuxing and other fields tested well in the field, 0.4 pounds per mu medication, prevention and control of more than 90% , Is currently one of the effective anti-leech agents. The active ingredient of this agent is tetraethyl thio pyrophosphate, more toxic