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湖北随州市读者杜白莲来信反映:我地不少砂梨种植户,梨园多年发生极难治的梨木虱、轮纹病、黑星病等病虫害,给果农造成严重的损失,大家苦不堪言。湖北省农科院(武汉430064)果树专家徐宏汉答:果树病虫害的防治,要采取综合防治措施才能取得较好的效果。砂梨较抗黑星病,只要搞好冬
A letter from Du Bailian, a reader in Suizhou City, Hubei Province, reflects that many sand-peasters and peasants in my area have been suffering from pest and pest diseases such as pear psylla, rotundus rotundus and scab, which have caused serious losses to the peasants. All of us are miserable. Hubei Academy of Agricultural Sciences (Wuhan 430064) fruit tree expert Xu Honghan A: Prevention and control of pests and diseases of fruit trees, to take comprehensive prevention and control measures in order to achieve better results. Sand pear anti-scab, as long as good winter