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第一,减少越冬菌源。苹果轮纹病枝干上的病斑是侵染果实发病的主要病菌来源,因此,在早春发芽前要刮除病皮,并喷3～5度石硫合剂,杀死附着在树体上的病菌。另外,要对当年脱落的病果、病皮以及树上的病枝等进行彻底清除,集中一起烧毁深埋。第二,保护好幼果。苹果轮纹病在花期不能被侵染,谢花后两周的幼果直到采收前均能被侵染,以幼果期最盛。因此,在花后两周就应喷第一次杀菌剂,保护幼果。还可采用果实套袋来保护幼果,套袋前应喷一次杀菌药。套袋时向应从两个方面来考虑:一是在桃小食心虫羽化产卵期前,二是六月生理落果期后。套袋过早,生理落果后容易产生空袋,过晚病菌
First, reduce the source of overwintering. Apple blight on the stem of the disease is the main pathogen infection in the source of the disease, therefore, in the early spring to cure the skin before scraping and spray 3 ~ 5 degrees stone sulfur mixture to kill attached to the tree body Germs. In addition, we should thoroughly remove the diseased fruits, diseased bark, diseased bark and other diseased branches of trees that were shed in that year, and burnt them together for a long time. Second, protect the young fruit. Apple rings disease can not be infested at flowering, two weeks after Thanksgiving flower young fruit can be infected until harvest, the most vigorous in young fruit. Therefore, the first fungicide should be sprayed two weeks after anthesis to protect the young fruit. Fruit bagging can also be used to protect young fruit, bagging should be sprayed before a bactericide. When bagging should be considered from two aspects: First, Peach Moth worms eclosion before the spawning period, the second is after the physiological fall period in June. Bagging premature, after the physiological fall fruit prone to empty bags, late bacteria