狗牙根(Cynodon dactylon)在陕西省分布极为广泛,遍及南北各地。它蔓延力强,茎根盘结,茎叶广铺地面,极耐践踏,是一种优良的草坪草种,在各地除铺建草坪及运动场外,还可作为保土植物用作护沟固坡、护岸固堤。近年来,发现狗牙根黑穗病在我国普遍且严重,一般病株率21～48%,严重地段高达73%。本文就该病的症状、病原、发生规律及防治方法作一初报。 Cynodon dactylon is widely distributed in Shaanxi Province, covering all parts of the country. It has strong spread, stems and roots knot, stems and leaves wide paving the ground, very trample resistant, is an excellent turf grass species, in addition to paving the lawn and playgrounds around, but also as a protective soil protection ditch slope , Bank protection solid embankment. In recent years, it has been found that bermudagrass morbidity is widespread and serious in our country. The average morbidity of diseased plants is 21 ~ 48% and the severe area is as high as 73%. This article on the symptoms of the disease, the pathogen, the occurrence of law and prevention methods for the first report.