烟草赤星病菌孢子萌发和侵染条件的研究  

STUDY ON CONDITIONS FOR SPORULATION AND INVASION TO HOST OF TOBACCO BROWN SPOT PATHOGEN

作　　者：董汉松[1] 曲建军 吕士恩[1] 孙明业 王智发[1] 

机构地区：[1]山东农业大学,泰安271018 [2]山东蓬莱园林管理所 [3]山东莒县烟草公司

出　　处：《山东科学》1993年第2期30-35,共6页Shandong Science

摘　　要：用烟草赤星病菌两个菌株进行测定,孢子在烟草叶面萌发能力最强;其次是在1％的葡萄糖溶液中;在蒸馏水中萌发最弱。在侵染试验中,用丙酮和70％酒精清洗的幼苗叶片发病加重;露天放置的烟苗较生长在温室内的烟苗发病重。在3种接种方法中,以孢子悬滴法效果最好。侵染和接种方法中的幼苗,其叶面微生物在种类和数量上均以处理的不同而有差别。Two strains of Alternaria alternata were tested for their conditions of sporulation and invasion to the host. The best sporulation was obtained when pathogen spores were incubated on leaf surface of tobacco seedling, and the worst on distilled water. The pathogenicity of pathogen was enhanced by washing leaf surface with acetone and 700% alcohol and by exposing the seedlings out of green-house. Three methods of inoculation were tested and droplet inoculation gave the most serious symptom. The components and population of microbes on the leaves and their effects on the host infection by pathogen were analysed.

关 键 词：烟草 赤星病菌 孢子萌发 侵染 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]