呼伦贝尔盟岭北和岭东国营农牧场及社队麦田,随着机耕作业的发展,麦田平播密植的推行,麦田根病较为普遍,苗期有点片或大片“枯死”“蔫萎”、“根腐烂”、“苗折倒”等症状;生育期和后期成株表现“白穗”、“死株枯穗”、“枯白穗”、茎基部腐烂倒伏等症状;在低洼潮湿的土壤表现严重;排水良好、土质疏松的土壤则发生轻微。为便于鉴别,现将9种类型的根病分述如下:1.小麦全蚀病苗期茎部叶片发黄,地下茎、种子根、次生根呈灰黑色至黑色;成株茎基部和最低一层叶鞘内侧聚积 Hulun Buir League Ridge North and East Lingdong state farms and community teams of wheat fields, with the development of the operation of plowing, planting and planting of wheat planting, the root canal disease is more common in wheat seedling stage a bit or a large “withering” “wilt” Such as “root decay”, “seedlings fall down” and other symptoms; during the growth and the late stage, adult plants show “white spike”, “dead spike”, “dry white spike” Serious performance; well-drained soil loose soil occurred minor. In order to facilitate identification, the following nine types of root diseases are summarized as follows: 1. The total eclipse of wheat seedling stem yellow leaves, underground stems, seed roots, secondary roots gray to black; adult stem base and the lowest one Layer leaf sheath medial accumulation