玉米在我省已经成为粮、饲、经兼具的重要作物。近年,随着玉米种植密度的增加,施肥水平的进一步提高,以及玉米生长盛期适逢阴雨天气,田间湿度大,为玉米纹枯病的发生和流行创造了条件,菌源不断累积,发病有逐年加重趋势,已经成为影响玉米生产的主要病害,常发区产量损失达 Corn in our province has become a grain, feed, both by the important crops. In recent years, with the increase of planting density of maize, the further improvement of fertilization level, and the maize growing season coincides with the rainy weather and the field humidity, creating conditions for the occurrence and epidemic of corn sheath blight. Increasing trend year by year has become a major disease affecting maize production.