乐斯本是美国陶氏化学公司生产的含毒死蜱为有效成分的杀虫杀螨剂.常用剂型为40.7%乳油.此药在大连市金州区经过多年试验和应用证明,对多种害虫有较高的防治效果.该药剂是具有触杀、胃毒和熏蒸作用的高效、广谱有机磷制剂,尤其对果树害虫有良好的防治效果.使用浓度是:防治苹果绵蚜3000—4000倍液;防治桃小食心虫、苹果小卷叶蛾及叶螨1000—2000倍 Rex is the United States of America Dow Chemical Company containing chlorpyrifos as the active ingredient of the insecticide acaricide commonly used dosage form 40.7% EC. This drug in Dalian City, after many years of testing and application shows that a variety of pests are The medicament is an effective and broad-spectrum organophosphorus preparation with contact poisoning, stomach poisoning and fumigation, and has good control effect on pests of fruit trees in particular.The concentrations used are: 3000-4000 times of prevention and control of cotton aphid; Prevent Peach Moth, Apple Leaf Roller and spider mite 1000-2000 times