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豫北地区苹果园中常见的烂果病有炭疽病、轮纹病和霉心病三种病害。该地区年平均气温 1 3 4℃～1 3 6℃ ,年降水量多在 4 1 0ｍｍ～ 750ｍｍ之间。一般年份 ,多数果园烂果率在 2 0 %左右 ,多雨年份防治不力的果园 ,烂果率高达 80 %以上 ,严重影响着苹果的产量和质量。为帮助?
Common diseases in apple orchards in northern Henan are anthracnose, ring rot disease and mildew disease. The annual average temperature of the region is 134 ℃ ~ 136 ℃, and annual precipitation is more than 410 ~ 750mm. In general years, the majority of rotten fruit orchard rate of about 20%, rainy years, poor control of orchards, rotten fruit rate as high as 80%, seriously affecting the yield and quality of apples. For help?