苹果白粉病主要为害苗木的嫩芽、嫩叶、大树的新梢和幼叶,同时也为害花、芽和果实。古柳乡柳沟果园,1979年发病相当严重,特别是秋花皮、红玉等品种,被害新梢占90％以上,6月中旬部分叶片开始脱落。1980年春,在发芽前喷布70%可湿性硫黄粉150倍液,发芽后感病很轻,秋花皮新梢发病可控制在5％。1981年继续喷施,全部消了苹果的白粉病。 Apple powdery mildew is the main damage to shoots of young shoots, young leaves, shoots and young leaves of large trees, but also for flowers, buds and fruits. In ancient Liuliu Liugou orchard, the incidence was rather serious in 1979, especially autumn flowers, red jade and other varieties, victims accounted for more than 90% of shoots, some leaves began to fall in mid-June. In the spring of 1980, 70% of wettable sulfur powder was sprayed 150 times before germination, and the feeling of germination was very light. The incidence of fall flower new shoots could be controlled at 5%. Sprayed in 1981, all the apple powdery mildew.