半夏Pinellia ternata(Thunb.)Breit为天南星科多年生草本半夏属植物[1],其性温、味辛,具有镇咳祛痰、降逆止呕、消痞散结、抗心律失常、降血脂等功效,是一种临床应用较为广泛的药用植物[2-3]。据统计,在558种中药材中,半夏的使用频次居22位,国内每年使用量达5 000吨[4]。然而,以软腐病为首的病害严重影响半夏的产量。目前,使用百菌 Pinellia ternata (Thunb.) Breit Araceae perennial herb Pinellia [1], its warm, spicy, with antitussive expectorant, Jiangni vomiting, Xiaopi Sanjie, anti-arrhythmia, Blood lipids and other effects, is a clinical application of a wider range of medicinal plants [2-3]. According to statistics, of the 558 kinds of Chinese herbal medicines, Pinellia occupies a 22nd frequency of use and its annual domestic use reaches 5,000 tons [4]. However, diseases such as soft rot seriously affect Pinellia production. At present, the use of chlorothalonil