甘肃省小麦根病病原种类及致病性研究  

Pathogens and Pathogenicity of Root Rot of Wheat in Gansu Province

作　　者：盛秀兰[1] 金秀琳[1] 郑果[1] 杨风琪 

机构地区：[1]甘肃省农业科学院植物保护研究所

出　　处：《西北农业学报》1997年第1期35-38,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：甘肃省科委"八五"攻关资助项目

摘　　要：１９９１～１９９３年，从甘肃庆阳、武威等地区的７个县（市）采集小麦生育期病根标样１７３４份，进行室内病原分离及致病性测定。结果表明：引起省内小麦根病的病原种类有全蚀病菌小麦变种（Ｇａｅｕｍａｎｎｏｍｙｃｅｓｇｒａｍｉｎｉｓｖａｒ．ｔｒｉｔｉｃｉ）、全蚀病菌一新变种（Ｇ．ｇｒａｍｉｎｉｓｖａｒ．ｓｐ）、麦根腐病菌（Ｂｉｐｏｌａｒｉｓｓｏｒｏｋｉｎｉａｎａ）、小麦生离蠕孢菌（Ｂ．ｔｒｉｔｉｃｉｃｏｌａ）、黄色镰刀菌（Ｆｕｓａｒｉｕｍｃｕｌｍｏｒｕｍ）、禾谷镰刀菌（Ｆ．ｇｒａｍｉｎｅａｒｕｍ）、早熟禾根腐镰刀菌（Ｆ．ｐｏａｅ）和丝核菌（Ｒｈｉｚｏｃｔｏｎｉａｓｐ）等１０种病原菌，其中全蚀病菌分离频率最高（４８．３％）、致病力最强（病指６０．２～１００）。During 1991～1993,1 734 samples of root wheat rot have been collected from Qinyang, Wuwei and other 5 areas in Gansu province. Isolates and pathogenicity tests showed that there were 10 various pathogens, including Gaeumannomyces graminis var. tritici, G. graminis var. sorghi, Bipolaris sorokiniana, B.tritcicola, Fusarium culmorum, F. graminearum, F. poae, and Rhizoctonia sp. .Among them, G. graminis var. tritci had the highest isolated frequency and the highest virulence. This paper also dealt with their morphological characteristics and the symptoms causted by these pathogens. The unidentified new variant G. graminis var. sp. was first reported in this study.

关 键 词：小麦根病 病原种类 致病性 危害 

分 类 号：S435.121.4[农业科学—农业昆虫与害虫防治]