一、识别葡萄黑痘病又名萎缩病。俗名“黑斑”,是葡萄的重要病害。其主要表现症状为:1.叶片。叶受害后初期发生针头大褐色小点,之后发展成黄褐色直径1～4毫米的圆形病斑,中部变成灰色,最后病部组织干枯硬化,脱落成穿孔。幼叶受害后多扭曲,皱缩为畸形。2.果实。果实在着色后不易 First, the identification of grape black pox also known as atrophy. Common name “dark spots”, is an important disease of grapes. The main symptoms are: 1. Leaves. Occurred early after the leaves of the needle large brown spots, then developed into a yellow-brown 1 to 4 mm in diameter of the lesion, the central gray, and finally the diseased tissue dry sclerosis, shedding into perforation. After young leaves more distorted, shrinkage deformity. Fruit Fruit is not easy after coloring