随着套袋苹果数量的增加和规模不断扩大, 苹果黑点病危害呈逐年加重趋势, 已成为苹果产区套袋果主要果实病害。据调查,一般果园病果率50%, 严重时达70%～80%以上。但是在调查中还发现, 虽然去年属苹果黑点病多发年份, 仍有部分果农户的果园黑点病发病轻,病果率低,病果率仅占12. With the increase in the number of bagged apples and their ever-increasing scale, the risk of black spot disease in apple trees has been increasing year by year and has become the main fruit disease of bagged fruit in apple producing areas. According to the survey, the general fruit orchard disease rate of 50%, severe up to 70% to 80%. However, the survey also found that although there were many cases of black spots in apple blossoms last year, some fruit farmers still had less incidence of black spot disease in their orchards and a low incidence of disease and disease, accounting for only 12% of the cases.