<正>Crown rot of wheat is a newly discovered soil-borne disease in China.which is caused by a diverse group of Fusarium species.It occurs generally in Huang-Huai winter wheat area and shows a tendency of expansion and aggravation,which is a serious threat to wheat production.Li et a1.reported the F.pseudograminearum causing crown rot for the first time in China in 2012.The aim of the present study