葡萄霜霉病(Grapevine downy mil-dew)是一种危害性很大的病害,在我国葡萄产区多有发生,在新疆尚未见报道.1987年霍城县葡萄发生此病.至9月发病面积约占全县葡萄面积1396亩的80%,平均病穗率70.2%,病叶率下部为72—100%,中部为70—95%,上部为58—84%,病情指数为44.0—80.5,平均减产50%,损失35万元(每公斤按0.5元计). Grape downy mildew (Grapevine downy mil-dew) is a kind of harmful disease which occurs frequently in the grape growing areas of our country and has not been reported in Xinjiang. The area accounts for 80% of the grape area of ​​1396 mu in the county, with an average disease ear incidence of 70.2%. The lower part of diseased leaves is 72-100%, the middle part is 70-95%, the upper part is 58-84% and the disease index is 44.0-80.5 , An average reduction of 50% loss of 350,000 yuan (0.5 yuan per kilogram basis).