摘要
1986年～1990年从我省主要春小麦产区的酒泉、张掖、武威、兰州、临夏、白银、定西等地采集小麦根病标本2000余份,经室内常规分离和选择性分离,并经致病性测定表明:引起我省春麦区小麦根病的病原有根腐离蠕孢(Bipolaris sorokiniana);小麦生离蠕孢(Bipolaris tritici-cola);全蚀病菌(Gaeumannomyces graminis var.tritici);黄色镰刀菌(Fusarium culm-orum);禾谷镰刀菌(F.graminearum);丝核菌(Rhizoctonia sp);交链孢菌(Alternariaalternata)等。其中根腐离蠕孢和全蚀病菌为主要病原,它们出现频率高且致病力强。本文还对各种病菌的分布情况进行了分析,并对各种致病菌的主要特性进行了描述。
Since the root rot disease of spring wheat became a new problem in wheat production, 2000 samples infected with the disease were collected from the prefectures of Jiuqun, Zhangye, Wuwei, Linxia, Baiyin, Dingxi, Lanzhou and isolated with PDA medium and selective medium in laboratory during 1986 to 1990. After purification and identification, the results show- ed that the pathogens which caused root rot disease of spring wheat were a series of fungi species such as Bipolaris sorokiniana, B. triticicola, Gaeumannomyces graminis var. tritici, Fusarium culmorum, F. grominearum, Rhizoctonia cerealis, Alternaria alternata etc.. Pathogenicity tests indicated that B·sorokiniana and G. g. var. tritici, of the seven fungi species tested, were the main pathogens, the others were secondary or minor. In addition, the distribution and the frequency of oceurence of the pathogenic fungi in different regions were discussed and their biology were described. It is suggested that the root rot disease of spring wheat is caused by acomplex of root rot fungi composed of Bipolaris spp., G. g. var. tritici and other associated fungi.
出处
《甘肃农业大学学报》
CAS
CSCD
1991年第3期295-301,共7页
Journal of Gansu Agricultural University
关键词
春小麦
根病
病原
spring wheat
root rot disease
pathogens
