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大白菜黄叶病在生产中发生的年份较少。2006年,山东省昌邑市种植的近300hm2秋季大白菜发生了严重的黄叶病,发病率高达95.6%,近15%的面
Chinese cabbage leaf disease occurred in the production of less years. In 2006, nearly 300hm2 of autumn Chinese cabbage planted in Changyi City of Shandong Province experienced serious yellow leaf disease with a rate of 95.6% and nearly 15%