近年来,由于忽视有机肥的施用,偏施氮肥,加上插植密度增加,水稻纹枯病有逐渐加重的趋势。水稻被纹枯病危害后,一般减产10%左右,发病重的田块减产25%以上,甚至颗粒无收。因此,应重视早稻纹枯病的防治,其方法是:一、加强水肥管理。禾苗在分蘖后,要适时晒田,避免过多施用氮肥,应增施磷钾肥和多 In recent years, due to ignoring the application of organic fertilizer, partial nitrogen fertilizer, coupled with increased planting density, rice sheath blight has gradually increased the trend. Rice is affected by sheath blight, the general reduction of about 10%, the incidence of heavy cut more than 25% of the plots, and even crop failure. Therefore, should pay attention to prevention and treatment of rice sheath blight, the method is: First, to strengthen water and fertilizer management. Grasses in the tillering, timely sunning, to avoid excessive application of nitrogen fertilizer, phosphorus and potassium should be increased and more