病名葡萄霜霉病为害植物葡萄发生地区葡萄种植区域 该病可为害叶片、新梢、幼果等,轻者造成叶片大量脱落,枝条不充实,冬芽不饱满,影响葡萄次年产量和质量,重者造成枝条或整株枯死。 1.为害症状 叶片受害,叶面呈淡黄色斑点,叶背面产生白色霜霉,病叶逐渐干枯脱落,新梢发病开始为 The disease name grape downy mildew plant grapes grape wine growing areas of the region can damage the leaves, shoots, young fruit, the light caused by a large number of leaves off, inadequate branches, winter buds are not full, the next grape yield and quality, weight Causes the branches or whole plant to die. 1. Victims of damage leaves, the leaves were pale yellow spots, the back of the leaves produce white downy mildew, sick leaves gradually dry off, the onset of new shoots