葡萄毛毡病是由微小的锈壁虱寄生所引起的一种病害。叶片受害后于叶背产生若干不规则苍白色小斑,以后逐渐扩大产生似毛毡的白色绒毛而凹陷。严重时叶片卷缩变厚,凹凸不平,树势生长衰弱。近几年,随着各地葡萄栽植面积的不断扩大,不少地区葡萄毛毡病的发生越来越严重,直接影响了葡萄产量与品质的提高。为 Vulgaris disease is a disease caused by the tiny rust ticks parasites. After the leaf damage on the back of the leaves produce a number of irregular pale white spots, and later gradually expanded to produce felt-like white fluff and depression. Serious leaf curling thicker, uneven, tree growth weak. In recent years, with the continuous expansion of the area planted with grapes, the incidence of grapefruit disease in many areas has become more and more serious, directly affecting the yield and quality of grapes. for