葡萄褐斑病在我国东北、华北、华中和西北等地葡萄产区均有发生.本病一般在管理粗放、密蔽潮湿的果园发生严重.葡萄植株染病后,早期落叶,树势削弱,产量下降.在新疆,伊犁、库尔勒等地有本病发生,罹病叶片上有大小、形状不同的褐色病斑,与内地的葡萄褐斑病不同,分为斑点病和霉斑病两种.为便于栽培者识别和鉴定这两种病害,现将它们的区别介绍如下.一、症状斑点病和霉斑病主要发生在叶片上,有时幼嫩枝梢上也有发生.这两种病,既可单独发生,也可混合发生.其共同症状是:发病初期叶面无病斑,叶背面有病原菌子实体,随着子实体的扩大增多,叶面先出现黄色病斑,以后逐渐变成褐色,病斑呈圆形或不规则形,周围有黄色晕圈.其不同之处是:斑点病病斑多为圆形,子实体黑色小粒点状,霉斑呈圆形;而霉斑病病斑为不规则形,或沿叶缘形成片斑,子实体浅黑色绒状,霉斑受叶脉限制而呈多角状. Grape leaf spot occurs in grape areas in northeastern China, northern China, central China and northwestern China, etc. The disease is generally serious in the extensive and densely humid orchards, with early deciduous grapevine, Fall in Xinjiang, Ili, Korla and other places have the disease occurs, diseased leaves have size, shape of the brown spots, and the mainland’s brown spot disease is divided into two kinds of spot disease and mycotic disease. Grower identification and identification of these two diseases, the differences are described below. First, the symptoms of spot disease and mycosis mainly occurs in the leaves, sometimes young shoots also occur on both diseases, either alone Occurred, can also be mixed. The common symptoms are: the early onset of foliar no disease, the back of the leaves of pathogenic bacteria fruiting bodies, with the expansion of the fruiting bodies, the first yellow lesions on the leaves, then gradually turned brown, the disease The spots are round or irregular with yellow halo around.The difference is that spot spots are mostly round and fruiting body with small black spots and mildew spots are round and mildew spot is Irregular shape, or along the leaf edge of the formation of patchy, fruiting body black velvet , Mildew and ESCs subject to restrictions veins.