草业学报Issue(6)：266-273,8.DOI:10.11686/cyxb20140632
当归新病害--炭疽病病原鉴定及发病规律研究
Pathogen identification and occurrence regularity of a novel disease---Angelica anthracnose
摘要
Abstract
A suspected anthracnose disease on Angelica stems was found in the main producing areas in Gansu province in 2012 and 2013.The major damage of this disease is to the plant stem.In the initial stages of the disease,many light brown spots appear on stems,and then expand to dark brown rectangular lesions,leaf chlorosis and wilting.Stems gradually dry up from outside to inside,abundant black acervuli appear on the spots,and then the plant dies.Through pathogenicity testing,morphology and ITS sequence analysis we de-termined that the pathogen of Angelica anthrax is Colletotrichum dematium .As far as we know,this study is the first report for this disease.An inoculation test using potted plants indoors shows that puncturing,root-ir-rigation and spraying with conidial suspension all can cause disease.Puncturing caused the most severe symp-toms.Spraying with suspension induced the lightest symptoms.C.dematium can infect Angelica through wounds,roots and aerial parts.This disease first appears in mid or late June,and incidence peaks in late Au-gust or early September.Field temperature and relative humidity are significantly positively correlated with disease incidence and severity,suggesting that high temperature and high humidity promote progress of the in-fection.The impact of humidity on disease development is greater than temperature.This study provides a ba-sis for developing prevention and control methods for Angelica anthrax.关键词
当归/炭疽病/病原鉴定Key words
Angelica sinensis/Anthracnose/pathogen identification分类
农业科技引用本文复制引用
卞静,陈泰祥,陈秀蓉,王涵琦,杨小利,王艳..当归新病害--炭疽病病原鉴定及发病规律研究[J].草业学报,2014,(6):266-273,8.基金项目
甘肃省中药材产业科技攻关项目（GYC11-01）资助。 （）
