一、二斑叶螨的危害二斑叶螨主要为害桃树,对梨树、葡萄、杏、山楂等危害也比较严重。二斑叶螨以若螨、成螨聚集在果树叶片的背面刺吸汁液,危害轻时,受害叶片失绿,呈浅白色;危害严重时,叶片焦枯脱落;虫口密度大时,在叶片背面结一层白色丝网或在新梢顶端群虫集结呈球状。二、二 First, the two-spotted spider mite hazards Two-spotted spider mite pests damage the main pears, grapes, apricots, hawthorn and other hazards are more serious. Tetranychus urticae mites, mites mites gathered in the back of fruit tree leaves sucking juice, endanger the light, the victim leaves lost its green, pale white; serious damage, the leaves scorch off; insect population density, the blade back knot A layer of white mesh or group shoots at the top of the shoot. two two