甘肃省当归病害种类调查及其病原鉴定

Disease Survey and Pathogen Identification on Angelica sinensis in Gansu Province

对甘肃省当归(Angelica sinensis)主产区岷县、渭源等4县5个乡镇的当归病害进行了调查和病原鉴定,共发现7种病害,分别为当归褐斑病(Septoria sp.)、白粉病(Erysiphe heraclei DC.)、根腐病[Fusari-um avenaceum(Fr.)Sacc.]、霜霉病[Plasmopara angelica(Caspary)Trotter]、茎线虫(麻口)病(Ditylenchusdestructor Thorne)、1种病毒病和1种细菌性病害(毒源和菌源待定)。茎线虫病和根腐病发病率在60%～70%,严重影响当归的产量和品质,是亟待解决的问题。

7 diseases have been found through disease surveys on Angelica sinensis in Minxian,Weiyuan county of Gansu Province.They were brown spot（Septoria sp.）,powdery mildew（Erysiphe heraclei DC.）,root rot [Fusarium avenaceum（Fr.）Sacc.],downy mildew（Plasmopara angelica）,nematode（Ditylenchus destructor Thorne）,a virus and a bacteria disease.Brown spot and nematode were the most severe diseases,whose incidence reached 60%～70%,and are the urgent problems needed to be solved effectively.