大麦条纹病,又名条斑病,是由Helminthosporium gramineum Rabenb.侵染引起的,为我国大麦重要病害之一,以长江流域各省为重,浙江、江苏两省发病极为普遍。1985年奉化县种植的高产感病品种沪麦4号,株发病率在2％左右,1986、1987年上升到5％左右,重病田可达20％。此病由种子带菌,被害麦株表现系统性 Barley stripe disease, also known as leaf spot disease, is caused by the infection of Helminthosporium gramineum Rabenb. It is one of the important diseases of barley in our country. It takes the provinces in the Yangtze River valley as the most important. The incidence of barley is extremely common in Zhejiang and Jiangsu provinces. In 1985, the high-yielding susceptible variety “Humai 4” planted in Fenghua county had a morbidity rate of about 2%. In 1986 and 1987, it rose to about 5%, and severe disease reached 20%. The disease is carried by the seed and the wheat plants that are victimized exhibit systemicity