关键词: 马铃薯, 黑胫病, 病原, 鉴定

Abstract: In order to clarify the species and biological characteristics of the pathogen which caused potato blackleg disease in Fujian Province，the pathogens were collected and isolated from Qingkou，Xiapu and Zhouning，and the pathogens were identified with plate isolation，purification，pathogenicity，physiological and biochemical characteristics and molecular biological methods. The results showed that nine strains of potato blackleg pathogens were isolated from the pathogenic potato，two were identified as Pectobacterium atrosepticum，three as P. carotovorum subsp. carotovorum，and four as P. carotovorum subsp. brasiliensis. And the nine strains were different，the pathogen in Qingkou was P. atrosepticum，that in Xiapu was P. carotovorum subsp. carotovorum，and that in Zhouning was a mixture of P. carotovorum subsp. carotovorum and P. carotovorum subsp. brasiliense.

Key words: potato, blackleg disease, pathogen, identification