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苹果白粉病是烟台苹果产区的重要病害,幼树新梢被害率高达50％以上。成龄果树越冬芽平均受害率为4.3％,重病果园花丛被害率达26.7％,发病高峰期新梢被害率达80％以上。新梢被害幼叶皱缩脱落,被害花芽座果率低,受害果实着生锈斑降为等外果。以往,防治苹果白粉病主要采用人工摘除病梢和喷布石硫合剂等措施,不能有效地控制为害,1982—1985年,我所进行了粉锈宁防此病的研究,并配合病区县市创造了60万亩防病示范区,取得了明显的防病增产效果,深受群众欢迎。研究结果初报于下。
Apple powdery mildew is an important disease in Yantai apple producing areas, young shoots shoot damage rate as high as 50%. The average damage rate of overwintering buds of adult fruit trees was 4.3%, that of seriously ill orchard flowers was 26.7%, and that of the shoots at the peak of incidence was more than 80%. Shoot damage Shoot shoots off new shoots, flower buds damaged fruit rate is low, the victims of fruit rust spots reduced to such extra-fruiting. In the past, the prevention and control of apple powdery mildew mainly by artificial removal of disease tips and spraying stone sulfur mixture and other measures, can not effectively control the damage, 1982-1985, I conducted a study of the prevention and control of this disease, and with the wards counties and cities created 60 million mu demonstration area of disease prevention and achieved significant results of disease prevention and increase production, welcomed by the masses. The results reported in the first.