苹果白粉病是我市苹果产区分布很广的一种重要病害。据近几年调查,在不少果园的新平、伏花皮、小国光、红玉、红香蕉等苹果品种的大树上,春季病芽率平均为4.3%,花芽被害率为4.2%,重病果园高达26.7%,发病高峰期新梢被害率高达60%以上。当前,苹果大面积生产中,主要采用摘除病梢和 Apple powdery mildew is a widely distributed in the apple-producing areas in our city an important disease. According to the survey in recent years, in many orchards of Xinping, Fuhua Pi, Xiao Guoguang, red jade, red banana and other apple trees, the average rate of the spring disease buds was 4.3%, flower buds were 4.2%, serious illness Orchard up to 26.7%, the peak incidence of shoots as high as 60% or more. At present, large-scale production of apples, the main use of removal of lesions and