小麦纹枯病又称立枯病、尖眼点病,近年已成为滑县小麦的重要病害,病株因叶鞘、茎秆受害而导致穗粒数减少,籽粒灌浆不足,一般造成小麦产量损失5%~15%,严重在30%以上,成为影响小麦高产稳产的重要因素之一。一、症状特征小麦感病后,在各生育阶段所表现症状不同,主要发生在叶鞘和茎秆上。幼苗发病初期,在地表或近地表的叶鞘上先产生淡黄色小斑点,后呈 Wheat sheath blight, also known as blight, pointed point disease, in recent years has become an important disease in Huaxian wheat, diseased plants due to leaf sheath, stem damage caused by reduced grain number per spike, insufficient grain filling, generally resulting in loss of wheat yield 5 % ~ 15%, serious in more than 30%, has become one of the important factors affecting high and stable yield of wheat. First, the symptoms of wheat symptoms, different stages of the performance of symptoms, mainly in the leaf sheath and stem. Early stage of seedling emergence in the surface or near the surface of the leaf sheath light yellow spots first, after