纹枯病是我县小麦生产上重要病害,重发年份,常因造成下部叶片早枯、根系早衰、基部节间输导功能下降,茎秆支撑功能减弱,幼穗发育不良而严重减产降质。近几年,纹枯病在我县已经发展成为小麦早衰和倒伏的重要因素,且有逐年加重的趋势。目前,各地推广品种对纹枯病均无抗性,加之一部分田块播种量偏大,地下水 Sheath blight is an important disease in wheat production in our county. The recurrence year is often caused by the early withered leaves of lower leaves, the premature decline of root system, the decreased conduction function of basal internodes, the weakening of stem supporting function, . In recent years, sheath blight has developed into an important factor of wheat premature aging and lodging in our county, and there is a trend of increasing year by year. At present, the promotion of varieties around the sheath blight are not resistant, in addition to some of the field seeding is too large, groundwater