恶苗病是杂交早稻生产上的一个重要障碍。目前长江流域应用的主要早杂组合威优49、威优17和威优48等都不抗恶苗病。我市1986和1987连续两年种植威优49和威优48都遭到了不同程度的恶苗病危害,部分秧田还出现了翻耕毁苗现象,严重阻碍了早杂生产 Bakanaemia is an important obstacle in the production of hybrid early rice. At present, the main early hybrid rice combination Weiyou 49, Weiyou 17 and Weiyou 48 are not resistant to the disease. The city of 1986 and 1987 for two consecutive years of planting Weiyou 49 and Weiyou 48 have been subjected to varying degrees of diarrheal disease hazards, some seedling also appeared tillage destroyed seedling phenomenon, seriously hampered the early hybrid production