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２０％三氯杀螨醇—哒螨酮乳油是化工部农药剂型中心新近研制出的复配杀螨剂，通过对危害李树的山楂叶螨田间药效试验，结果表明防治效果较好。使用浓度１０００倍和１５００倍液的防治效果等于对照药剂２０％三氯杀螨醇乳油，使用浓度２０００倍液的防治效果略低于对照药剂２０％三氯杀螨醇乳油，但均优于１５％哒螨酮乳油，值得推广应用。推荐田间使用浓度为１５００—２０００倍
20% dicofol - pyridaben EC is a compound acaricide newly developed by Pesticide Formulation Center of Ministry of Chemical Industry. Through the field efficacy test of hawthorn spider mite which harm the plum tree, the results show that the control effect is better. The control effect of using 1000 times and 1500 times concentration of the control agent was equal to that of the control agent 20% dicofol EC. The control effect with the concentration of 2000 times was slightly lower than that of the control agent 20% dicofol but better than 15% pyridaben EC, which was worth promoting application. Recommended field use concentration of 1500-2000 times