在水稻苗期和分蘖期,纹枯病在田间主要是水平扩展,主要危害水稻叶鞘,到水稻生长中后期,田间高温高湿的环境有利于纹枯病发展,病害开始沿稻株垂直扩展,从稻株基部向上发展。水稻中后期喷药防治纹枯病,应着重将药液喷在稻株的中下部,这样才能收到较好的效果。喷施井冈霉素防治纹 In rice seedling and tillering stage, sheath blight spreads mainly horizontally in the field, which is mainly harmful to rice leaf sheath. By the middle and later stages of rice growth, the field environment of high temperature and humidity is conducive to the development of sheath blight, the disease begins to expand vertically along the rice plant, From the base of rice plant upward development. Late spraying of rice in the prevention and control of sheath blight, should focus on the liquid spray in the middle and lower rice plant, so as to receive better results. Apply Jinggangmycin control pattern