葡萄花期如逢阴雨天气,葡萄果实着色期间雨水较多时都易感染灰霉病。葡萄贮藏期也易发生此病。灰霉病对葡萄某些品种的生产会造成较大的损失,尤其设施栽培中常因封闭设施中湿度较大花果发病较重。 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,花穗易脱落,果实受侵染发病时易裂果,并引起整个果穗腐烂或干死。 2.发病过程 葡萄灰 Grape flowering, such as every rainy weather, grape fruit during the stain more susceptible to gray mold when the rain is more. Grape is also prone to the disease during storage. Botrytis cinerea on the production of some varieties of grapes will cause greater losses, especially in facilities and facilities often closed due to humidity in the greater incidence of floral diseases heavier. 1. Symptoms Grape spring after germination, the young shoots and shoots become brown after the disease, infected leaves appear reddish brown necrosis lesions, the incidence of spikes when the disease was dark brown soft rot, dry death, spikes Easy to fall off, the fruit is susceptible to infection when the incidence of cracking fruit, and cause the entire ear rot or die. 2. The incidence of grape ash