近年来，小麦效枯病发生为害越来越重，已成为影响淮北地区小麦高产稻产的重要因素之一。据调查，一般年份麦田纹枯病病株率在ZO％。25％，高的达50％以上。小麦改枯病病菌以促染小麦基部叶鞘及茎杆为主，发病初期在麦林基部叶鞘上卢生褐色病斑，有的病斑中部级裂，随气温升高 In recent years, the incidence of wheat leaf blight has become more and more serious, and it has become one of the important factors that affect the high yielding wheat yield in Huaibei. According to the survey, the prevalence of wheat sheath blight disease rate in ZO%. 25%, high up to 50% or more. Wheat disease caused by Rhizoctonia solanacearum to promote wheat basal leaf sheath and stem the main pathogenesis early in the McClellan base leaf sheath Lu brown brown spot, and some lesion middle splinter, with temperature