小麦纹枯病又称立枯病、麦尖眼病,该病是一种土壤传播的真菌病害。小麦在各生育期皆可受到纹枯病菌的侵染,严重影响小麦生产。发病早的小麦田减产20%～40%,严重的形成枯株白穗甚至颗粒无收。小麦纹枯病在我县有两个发病高峰,即小麦越冬前和返青拔节期,随着茎秆变硬,病菌向上发展,但以5节以内发病重,重病株往往会因失水而枯死,田间出现白穗,但大部分病株茎秆基部变软倒状,导致小麦千 Wheat sheath blight, also known as blight, wheat sharp eye, the disease is a soil-borne fungal disease. Wheat can be infected with Rhizoctonia solani during all its growth stages and seriously affect wheat production. The incidence of early wheat yield reduction of 20% to 40%, the formation of severe white corns and even crop failure. Wheat sheath blight has two peak incidence in our county, that is, wheat before winter and back to green jointing stage, with the harden of stalks, germs upward development, but within 5 days of severe onset, seriously ill strains often die of dehydration , White spike appeared in the field, but most of the diseased stem base softened inverted, leading to wheat thousand