当归麻口病是目前我省当归产区主要病害之一。据1986年岷县、渭源、宕昌、漳县10个乡49个社121块地的调查,田间发病率一般为84.8％,病指数为56.4％;严重的高达100％。当归麻口病主要发生在“成药期”。症状在病株地上部分不明显,主要表现在根部。根部变褐、变麻、裂口,其皮层呈现海绵糠腐状,严重地威胁我省当归的生产和销售。以往对其病 Angelica gingivalis is one of the main diseases in Angelica area in our province. According to a survey of 121 communities in 49 communities in 10 counties in Minxian County, Weiyuan County, Dangchang County and Zhangxian County in 1986, the incidence in the field was generally 84.8%, the disease index was 56.4% and the severity was as high as 100%. Angelica mouth disease mainly occurs in the “drug-induced period.” Symptoms in the diseased part of the ground is not obvious, mainly in the roots. Root brown, change Ma, split, the cortex showed sponge bran rot, a serious threat to our province Angelica production and sales. In the past the disease