红蜘蛛是果树的主要害虫。大发生的年分能使大部树叶落光,有的造成二次开花。受害严重的,当年果实不能成熟,而且影响次年产量。过去常用喷雾防治,不仅杀伤大量天敌,而且消耗了大量人力和农药,但除治效果并不理想。为了解决这个问题,我们在5个果园进行了“药油”涂干防治试验。试验证明,涂药后3天,虫口减退率达90%以上,可控制半月左右。具体方法是: Red spider is a major pest of fruit trees. Large annual leaves can make most of the light falling, and some cause secondary flowering. Seriously affected, then the fruit can not mature, but also affect the production of the following year. In the past commonly used spray control, not only kill a large number of natural enemies, but also consume a lot of manpower and pesticides, but the cure is not ideal. In order to solve this problem, we carried out “oil” coating dry prevention and control experiment in five orchards. Test proved that, 3 days after coating, the rate of population decline of more than 90%, can control about half a month. The specific method is: