川乌是鄂西北高山地区常年种植的主要中药材之一。近年来,川乌价格稳定上扬,药农种植积极性高涨,种植面积不断扩大,但各种病害发生面积、危害与损失程度也随之加重。尤其是菌核病,已成为药农种植川乌的最大心理障碍,亟待加强防治。菌核病是对川乌生长后期对产量威胁最大的病害。发病严重时,川乌茎杆基部组织完全被病菌破坏,极易出现倒伏、减产。高山夏季多雨高湿年份,川乌最易发病。植株被病菌侵染后,茎基先呈褐色,很快长出白色绵毛状菌丝。在适温高湿环境下,病菌会迅速侵染、传播、蔓延,并逐渐形成菌核。菌核初为白色小粒, Chuanwu is one of the main Chinese herbal medicines planted year-round in the high mountains of northwestern Hubei. In recent years, the price of Chuanwu rose steadily. The enthusiasm of the peasants and peasants planting was high and the planting area was constantly expanding. However, the occurrence area, harm and loss of various diseases also increased. In particular, Sclerotinia has become the biggest psychological obstacle for Chinese medicine practitioners to plant Chuanwu and urgently needs to step up prevention and control. Sclerotinia sclerotiorum is the disease that threatens to yield the most during the late growth of Chuanwu. When the disease is serious, Chuanwu stalk basal tissue completely destroyed by bacteria, prone to lodging, yield reduction. Alpine summer rainy and humid years, the most vulnerable Chuanwu onset. After the plants were infected by germs, the stem base first brown, and soon grew white Ciliaris mycelium. In the temperature and humidity environment, the bacteria will rapidly infect, spread, spread, and the gradual formation of sclerotia. At the beginning of sclerotiorin small white particles,