小麦根病主要有三种:小麦全蚀病、小麦纹枯病和小麦根腐病。它们主要危害小麦根茎基部,整个生育期均可发病,一般发病可使小麦减产10—20％,重者减产70—80％,严重的造成绝产。病害蔓延程度很快,在田间呈现“点—线—片”发生。 一、病害种类 1.小麦全蚀病 幼苗受害,轻的症状不明显,重的幼苗矮化,叶色变浅,底叶发黄,类似干旱缺肥 Wheat root disease there are three main types: wheat eclipse, wheat sheath blight and wheat root rot. They mainly endanger the base of wheat rhizome, and can be affected throughout the growth period. The general incidence can reduce the yield of wheat by 10-20%, and decrease the production by 70-80% in severe cases, resulting in serious production. The spread of disease is very fast, presenting “spot-line-slice” in the field. First, the types of diseases 1. Wheat eclipse seedling damage, light symptoms are not obvious, heavy seedlings dwarfed, leaf color shallow, yellow leaves, similar to the lack of drought