为解决单用菊酯类农药使害虫很快产生抗药性的问题,1989年3—4月间,应用25%菊乐合酯乳剂在金华、武义等5县进行了飞机超低量喷雾防治马尾松毛虫试验和大面积推广。防治结果表明,每亩用药量7、9、11毫升,对3—4龄和5龄松毛幼虫虫防治效果达96.5%以上,且药效稳定,成本略低于菊酯类农药,可延缓害虫产生抗药性。 In order to solve the problem that insecticides could be quickly produced by pyrethroid pesticides alone, from March to April 1989, 25% chrysanthemum lactone emulsion was used to control ultra-low-level aerosol spray in five counties of Jinhua and Wuyi. Dendrolimus trial and large-scale promotion. The control results showed that the dosage of 7, 9 and 11 ml per acre reached 96.5% of control effect on 3-4-instar and 5-year-old larvae, and the efficacy was stable and the cost was slightly lower than that of pyrethroid pesticides, Pests produce resistance.