红蜘蛛是果树的顽敌 ,近年来由于一些地方连年单一使用化学农药 ,使红蜘蛛产生了较强的耐药性 ,防治效果逐年下降。而使用植物农药防治红蜘蛛效果良好 ,且材料易得 ,制作简单 ,成本低廉。现介绍６种实践效果较好的植物农药 ,供果农和大型果园借鉴。烟草制剂烟碱对害虫具有强烈 Red spider is a stubborn enemy of fruit trees. In recent years, due to the continuous use of chemical pesticides in some places year after year, the red spider has a strong resistance and the control effect declines year by year. The use of plant pesticides to control spider mite good effect, and easy to get the material, making simple, low cost. Presently, six kinds of plant pesticides with good effect are introduced for reference to fruit growers and large orchards. Tobacco formulations nicotine is very strong on pests