小麦根腐病是由半知菌类长蠕孢属真菌侵染而引起的一种真菌性病害。病菌潜伏在种子内和土壤中随,病株残体可存活1￣1.5年小,麦整个生育期均可发病病,菌初染危害小麦根部和幼苗通,过风雨传播进行再侵染扬,花后小麦受害最重根部产生褐色或黑色病斑最,后腐烂病,株表现『假旱象』出 Wheat root rot is a fungal disease caused by the infection of Helminthosporium fungi. Bacteria lurk in the seeds and the soil, the diseased plant residues can survive 1 ~ 1.5 years, wheat can develop disease throughout the growth period, the initial infection of wheat roots and seedlings pass through the spread of wind and rain and then re-infection Yang, The heaviest roots of post-flowering wheat produce the most brown or black spots, and after rot disease, the plants show “fake drought”