小麦纹枯病是小麦生产进入高产水平的一种新病害，近几年在发生面积、程度上都呈上升趋势，已成为我省中、高产麦田主要的常发性病害。小麦纹枯病一般表现为在地表处小麦茎节叶鞘上，先产生不太明显的周边褐色、中部浅褐或灰白色的梭形病斑，以后病斑逐渐扩展，呈云纹状；... Wheat sheath blight is a new disease of wheat production entering the high yield level. In recent years, the occurrence of wheat sheath blight has been on an upward trend in area and extent, and has become the major disease in middle and high yield wheat fields in our province. Wheat sheath blight is generally manifested in the surface of wheat stem leaf sheath, the first to produce less obvious peripheral brown, central light brown or gray fusiform lesions, after the lesion gradually expanded, was moire ...