不论是早稻还是晚稻几乎年年都会发生纹枯病的危害,尤其是近年来晚稻中后期的发生,常给人以防不胜防之叹。究其原因,主要是目前缺乏对纹枯病的高抗品种。笔者接触多年的病虫防治发现,几乎没有一个品种是不感染纹枯病危害的。另一个主要原因是栽培中的化肥用量大,稻株生长嫩绿,后期荫蔽程度大易感病。长期以来,防治水稻纹枯病一直用井冈霉素,在一 Whether it is early or late rice occurs almost every year, the threat of sheath blight, especially in late late rice occurred in late years, often giving people to prevent the sigh. The reason is mainly due to the current lack of high resistance to sheath blight varieties. The pest control that I contacted for many years found that almost no species is not infected with sheath blight. Another major reason is that the amount of chemical fertilizers used in cultivation is large, and the rice plants grow verdant, and the degree of shade in the latter period is greatly susceptible to disease. For a long time, control of rice sheath blight has been used Jinggangmycin, in one