苹果果实轮纹病的菌源主要为树体上干腐病和轮纹病。3～12月田间均有孢子,4月下旬～5月、7～8月为扩散高峰。孢子经气流、雨水传播至果实。整个生育期果实均可被侵染,侵染率高低与降雨、果实生育期密切相关。被侵染果实多在近成熟发病,贮藏一个月内最重。 The main source of apple fruit ring rot disease is rot and rotten tree disease. 3 ~ December field spores, late April ~ May, July to August for the proliferation of peak. Spores through the air, rain spread to the fruit. Fruit throughout the growing period can be infected, the level of infection and rainfall, fruit growth period are closely related. Infected fruit and more in the near mature disease, the heaviest storage within a month.