Disease Survey and Pathogen Identification on Codonopsis pilosula in Gansu Province
4 fungal diseases have been found through disease surveys on Codonopsis pilosula in Weiyuan , Longxi county of Cansu Province from 2004 to 2009 . They were leaf spot (Septoria codorwpsidis), powdery mildew(Sphaerotheca codonopisi), grey mold (Botrytis cinerea Pers.) and root rot (Fusarium oxyxporiwn Schl.). Powdery mildew, the severest disease, whose incidence reached 100%, was an urgent problem waiting to be solved effectively. Grey mold in the paper was the first report in China.