麦类纹枯病近年来有上升趋势，严重制约着大、小麦的产量和品质提高，如何进行经济有效的防治，减少其损失，已成为大、小麦生产上极待解决的问题。一、发生特点麦类纹枯病的发生从时间上．对分为冬前发病期和冬后发病期两个重要时期。前者以病菌侵入麦苗为主；后者是在冬前发 Wheat sheath blight has an upward trend in recent years, seriously restricting the yield and quality of large and wheat, how to carry out cost-effective prevention and control to reduce its losses has become an issue to be solved in large and wheat production. First, the occurrence characteristics Occurrence of wheat sheath blight from the time. Divided into winter onset and winter onset period of two important periods. The former is mainly inoculated with germs into wheat seedlings; the latter is made before winter