羊草(Leymus Chinensis)是重要的牧草之一,在我国东北地区及内蒙古自治区栽培面积较大,近年来受羊草粒线虫的侵染,重病地块发病率高达30％以上。受粒线虫侵染的羊草,植株生长低矮,花期推迟,比健 Leymus Chinensis is one of the most important forages and has a large area of ​​cultivation in northeast China and Inner Mongolia Autonomous Region. In recent years, Leymus Chinensis has been infected by Leptosphaeria nivalis. The incidence of serious disease is as high as 30%. Leymus chinensis infection by the nematodes, plant growth is low, flowering postponed, more than health