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杨树根癌病又称冠瘿病,在我国辽宁、河北、北京、山东、河南等地均有发生。北京市东北旺苗圃1979年春出圃的毛白杨大苗,病株率达15.8%;唐山园林局苗圃病株率达70%,严重地影响了杨树育苗及幼林的生长。由于杨树根癌病系我国森林植物检疫对象,很有必要搞清病原,以便作为检疫和防治的依据。为此,根据分类上的最主要特征,进行了病原的鉴定工作。
Poplar root cancer, also known as crown gall disease, in China’s Liaoning, Hebei, Beijing, Shandong, Henan and other places have occurred. Northeast spring Mongolian nursery nursery out of the spring of 1979, poplar seedlings, the diseased plants rate of 15.8%; Tangshan Bureau of Park nursery diseased plants rate of 70%, seriously affecting the poplar nursery and young forest growth. Because poplar root disease is the object of forest and plant quarantine in our country, it is necessary to find out the pathogen in order to serve as the basis of quarantine and prevention. To this end, according to the classification of the most important features of the identification of the pathogen.