金冠苹果早期落叶病在宁夏老灌区属常见病,近年在固原的引黄地区也开始大量流行、蔓延。李旺园艺场、高崖的部分果园1989年8月下旬落叶率高达37.5％以上,使果树的生长、结果受到严重影响。为了控制其病害,找出高效防治方法,我们进行了本试验。 Golden Delicious apple early deciduous disease is a common disease in Ningxia old irrigated area, in recent years in Guyuan Yellow River area also began a large number of epidemic, spread. Li Wang horticultural field, part of the high cliff Orchard in late August 1989 deciduous rate as high as 37.5%, so that the growth of fruit trees, the results have been seriously affected. In order to control its disease, to find effective prevention and treatment methods, we conducted the test.