近年来，小麦根腐病在迁安市时有发生。据资料记载，根腐病菌对小麦幼苗及成株均可为害。一般幼苗受害后可引起根腐、使植株分蘖、抽穗受阻，严重时整株变黄而枯死。生长后期成株受害后，叶片上常出现两种病斑，一种呈淡褐色大型椭圆不规则形斑，一种是中心灰白色或淡褐色小形 In recent years, wheat root rot has occurred in Qian’an City. According to records, root rot bacteria on wheat seedlings and adults can be harmful. General seedlings can cause root rot after victimization, tillering plants, heading obstruction, the whole plant becomes yellow and dead in severe cases. After the late growth stage of adult damage, the leaves often appear two kinds of spots, a pale brown oval irregular shaped spot, one is the center gray or light brown small