1、病菌的生活及生存樱桃灰星病菌越冬传染源在地面和树上越冬,越冬的子孢子形成分生孢子。地面越冬多为上一年落下被害果黑色的革皮状的菌核,菌核褐色约10mm 大小,盘状的数以千计的子孢子。在4月下旬～5月上旬,子孢子向空中喷射。开花期花被感染而产生花腐烂,果实发病幼果发生少,收获二周前的 1, the life and survival of germs Cherry gray spawn overwintering source of infection in the ground and trees wintering, overwintering sporozoites conidia. Overwintering ground mostly for the previous year fell victim to fruit black black leathery sclerotia, sclerotia brown about 10mm size, disk-shaped thousands of sporozoites. In late April to early May, sporozoites spray into the air. Perennial flowering is infected with flower decay, the incidence of fruit juvenile less fruit, harvested two weeks ago