山楂红蜘蛛和苹果红蜘蛛是危害苹果树的二种主要叶螨,生产上防治使用的药剂除石硫合剂外,主要是三氯杀螨醇和杀虫醚。虽然杀虫醚防治效果较好。但对人身有害。已被国家禁止使用。而三氯杀螨醇连年多次使用,已导致叶螨.产生抗药性。因此,为了解决生产防治急需,我们于1987年对国? Hawthorn red spider and apple spider mite are the two major spider mites that harm the apple tree. In addition to the lime-sulfur mixture, the agents used for prevention and control in production are mainly dicofol and insecticidal ether. Although insecticidal ether control effect is better. But harmful to the person Has been banned by the state. The use of dicofol in successive years has led to spider mites. Therefore, in order to solve the urgent need of prevention and control of production, we are in 1987 on the country?