苹果白粉病是危害苹果新梢、嫩叶、幼果等幼嫩部位的真菌病害,以嫩叶和芽受害为主。倭锦、红玉、国光、祝光品种易感此病。在一些树势衰弱、管理粗放、通风透光条件差的果园尤为严重,对果树的长势、产量、质量影响很大。 Apple powdery mildew is endangering apple shoots, young leaves, young fruit and other parts of the fungal diseases, young leaves and bud victims. Japanese Kam, red jade, Guoguang, Zhu Guang varieties susceptible to the disease. In some orchards weak, extensive management, poor ventilation and light orchards is particularly serious on the growth of fruit trees, yield, quality a great influence.