葡萄褐斑病在我国分布得相当的广阔,东北、西北、晋北,山东、察哈尔和绥远的葡萄栽培地区,常发生这种病害,幸而不是经常为害;长江流域虽然葡萄栽培得不很多,可是间或也发生褐斑病。这病害在潮湿的气候下面,尤其是当雨量较多的年季,很容易发生,并且通常很严重。若是病害发生较早,气候又适合病害的发展,叶片感病后,很早就脱落,使葡萄不能尽量结实,减低产量。一般的情形是病害发生后逐渐蔓延,叶片继续不断的脱落,阻碍枝条发育。病害严重 Grape leaf spot is widely distributed in our country. The disease often occurs in the viticulture areas of Northeast, Northwest, North Shanxi, Shandong, Chahar and Suiyuan. Fortunately, not the frequent damage occurs in the viticulture of the Yangtze valley. A lot, but occasionally also occurs brown spot. The disease is easily affected by humid climates, especially when it is raining, and usually very severe. If the disease occurs earlier, the climate is suitable for the development of the disease, leaves a sense of disease, very early off, so that grapes can not be as strong as possible to reduce production. The general situation is the spread of disease gradually after the leaves continue to fall off, hinder the development of branches. Severe disease