叶螨,统称为红蜘蛛,其一般在棚室的枯枝、腐叶、土缝中越冬,或随种苗进入棚室,温度适宜时开始大量繁殖为害。叶螨也是设施西瓜上的主要害虫之一,尤其是西瓜生长的中、后期,在高温干旱的气候条件下繁殖迅速,极易暴发成灾,严重影响西瓜的产量和品质。防治叶螨成为近些年来最令瓜农们头疼的问题。为了杀虫,各种农药轮番上阵,但叶螨反而越来越严重,因为长期使用化学农药防治叶螨,已经引起了严重 Spider mites, collectively referred to as spider mites, are generally overwintering in the twigs, rotting leaves, soil seams in the greenhouse, or entering the greenhouse with the seedlings, at a time when the temperature is appropriate. Spider mites are also one of the major pests on watermelon facilities. Especially in the middle and late stages of the growth of watermelon, they are rapidly propagated in high temperature and arid climates and easily become violently disrupted and seriously affect the yield and quality of watermelon. Spider mite prevention and control in recent years become the most troubled farmers who have problems. In order to kill insects, all kinds of pesticides turn into battle, but more and more serious spider mites, because the long-term use of chemical pesticides to control spider mites, has caused serious