1．症状葡萄春季萌芽后，幼芽与嫩枝感病后变为褐色，叶片受感染时出现红褐色坏死病斑，花穗受感染发病时病部呈暗褐色软腐、干死，花稳易脱落，果实受侵染发病时易裂果，并引阳整个果腐烂或干死。2二发病过程葡萄灰霉病以菌核或菌丝体越冬。春天在适宜温度与雨水条件下产生分 1. Symptoms Grape after germination in spring, the young shoots and shoots become brown after infection, leaves infected with reddish brown necrosis lesions, the incidence of infected spikes when the disease was dark brown soft rot, dried to death, flowers easily fall off , The fruit is susceptible to infection when the disease is susceptible to infection, and lead the whole fruit rot or dry death. 2 two pathogenesis Botrytis cinerea mycelium or mycelium wintering. Spring in the appropriate conditions of temperature and rain produce points