梨黑星病病菌主要以菌丝在病芽中越冬,病芽极难识别。冬季温暖干燥或寒冷潮湿年份,病菌也可在带病落叶上越冬。冬季温暖潮湿,病叶易腐烂,病菌难以在落叶上越冬。贮藏期可以见到黑星病果,有些是生长期发病的,有些是生长期带菌、贮藏期发病的。常温贮藏时,果上病斑可继续扩展,甚至会感染其它果实而腐烂;冷库贮藏时,病斑扩展慢,很少腐烂。 Pear scab pathogens mainly in the bud overwintering in the disease, the disease is extremely difficult to identify buds. Warm or dry winter, cold and humid year, the bacteria can also wintering on fallen leaves. Winter warm and humid, diseased leaves perishable, bacteria difficult to wintering on the leaves. Starch can be seen during the shelf life, some are the onset of growth, and some are carrying growth stage, the incidence of storage. Stored at room temperature, fruit spots can continue to expand, and even infected with other fruits and decay; cold storage, lesion spread slowly, rarely rot.