摘要
桑树细菌性疫病在山东已调查的12个县、市均有发生。主要有黑顶、茎裂、缩叶和叶斑4种症状。5月底至6月初症状开始出现,7～8月份为发病盛期。发病率一般为5～10％,重者可达40％以上。对病原菌的鉴定结果表明,病原菌为丁香假单胞杆菌,桑树致病变种(Pseudomonas syringae P.V.mori)。测试的四个菌株(Pm_1、Pm_5、Pm_(31)、Pm_(35)除对个别的糖、醇利用能力有分化外,其生理生化性状基本一致。
Mulberry bacterial blight was confirmed to occur in investigated twelve counties and cities in Shandong Province.There were mainly four symptoms of the disease, including black top, splitted stem, shrinked leaf and leaf spot. The disease symptoms appeared at the end of May and beginning of June, and became severest during July and August. The diseased mulberry rate usually accounted for 5 to 10%, occationaly could be more than 40%, Identification showed that the pathogen was Pseudomonas syringae P. V.mori, and four tested strains (P_(m1), P_(m5), P_(m31), P_(m35)) from different locations were identical in their physiological and chemical properties except for utilization of a few saccharides and hexose alcohols.
出处
《山东农业科学》
1990年第6期12-14,共3页
Shandong Agricultural Sciences
关键词
桑树
细菌性疫病
mulberry
bacterial blight
pathogen
identification
