本文确定了当归麻口病病灶及其附近有包括50余种生物的土壤复合体,形成一个土壤生物食物网。对食物网成员关系作了新的补充。证实了燕麦镰刀菌等6种真菌是病原菌,是直接病因,地下害虫、人为和机械创伤形成的伤口有利于病原菌的侵染,无脊椎动物携带病原菌并参与为害,而更加导致该病的严重发生.根据病因和防治试验,提出一套综合治理措施,在甘肃推广1万4千多亩,获得了显著经济效益和社会效益。 This article identified the angelica and the mouth of the disease and its vicinity, including more than 50 kinds of biological soil complexes to form a soil biological food web. The membership of food network made a new supplement. Confirmed that six kinds of fungi, such as Fungi, are pathogenic fungi and are the direct cause. The wounds formed by underground pests, man-made and mechanical wounds are conducive to the infection of pathogenic bacteria. Invertebrates carry pathogenic bacteria and participate in the damage, which leads to the serious occurrence of the disease According to the etiology and prevention and control test, a set of comprehensive management measures was put forward to promote 14,000 mu in Gansu and obtain significant economic and social benefits.