莜麦是禾本科燕麦属的草本植物，是重要的饲草饲料作物。莜麦黑穗病是莜麦的主要病害之一，一般减产１０％左右，在河北、山西、内蒙古最高发病率曾高达４０％～９０％，造成大幅度减产。一、黑穗病的症状：它是一种真菌性病害。黑穗病又分为坚黑穗病、散黑穗病两种。１?.. Barley is a herbaceous plant belonging to the family Oats, which is an important forage crop. Smut is one of the main diseases of oatmeal, usually about 10% less than the maximum incidence in Hebei, Shanxi, Inner Mongolia had the highest incidence of 40% to 90%, resulting in a substantial cut. First, the symptoms of smut: It is a fungal disease. Smut is divided into firm smut, casual smut two. 1? ..