水稻恶苗病俗称白秆病、抢先稻。多年来自然发病较重。据近年各区（县）植保部门调查统计，恶苗病从秧苗期至抽穗期都有发生，自然发病株率在秧苗期为５％～１０％，在拔节孕穗期为１０％～２０％，严重田块病株率达３０％以上。通过严格的种子处理后，一般品种病株率在０．３? Rice stump disease commonly known as stalk disease, grab the first rice. Natural onset over the years heavier. According to the investigation and statistics of plant protection departments in all districts (counties) in recent years, the occurrence of stump disease occurs from the seedling stage to the heading stage. The rate of natural diseased plants is 5% -10% at the seedling stage and 10% -20% at the jointing and booting stage, Field disease rate of more than 30% of strains. After strict seed treatment, the general strain rate at 0.3?