1发病症状葡萄白腐病为害果穗、新梢、叶片,其中果实和穗轴受害严重。果实发病,一般发生在接近地面的果穗尖端,在小果梗或穗轴上先发病,初期为浅褐色、水渍状、不规则病斑,逐渐扩大蔓延至整个果穗;果粒发病,先从基部变褐软腐,迅速使整个果粒变淡黄褐色软腐,果面密布 1 symptom of grape white rot rottings affected ear, shoots, leaves, of which fruit and cob damage. Fruit disease, usually occurs in the tip of the ear close to the ground, the first in the small stems or cob on the onset of the initial light brown, water-like, irregular lesions, gradually spread to the entire ear; fruit disease, first from The base brown soft rot, the entire fruit quickly pale yellow brown soft rot, fruit dense