1999年我们在红富士苹果树上用海正灭虫灵防治二斑叶螨取得良好效果。 7月 5日当有螨叶率达30 %以上 ,平均每叶有成螨 1～ 2头时 ,喷 1%海正灭虫灵 50 0 0倍液 (浙江海门化工厂生产 ) ,药后 3天调查虫口减退率为 92 .5% ,10天达 99.3%。调查还表明 ,海正灭虫灵可兼治山楂红蜘蛛 In 1999 we Red Sea Fuji apple tree with sea pest control two-spotted spider mite get good results. July 5 when the mite leaf rate of 30% or more, an average of each leaf has 1 to 2 mites, spray 1% Haizheng pest control 50 0 0 times (Zhejiang Haimen Chemical Factory production), after 3 Insect population surveyed day rate of 92.5%, 10 days reached 99.3%. The survey also shows that sea spider mydriasis can cure both hawthorn red spider