关键词: 水稻恶菌病, 镰孢, 菌系

Abstract:

Infection plants of bakanae disease were collected from 22 counties(cities) in Hubei Province during 1990-1992. Thirty five isolates of single spore were isolated from the disease plants. Identification indicated that 31 isolates were F. moniliforme var. zhejiangensis; 2 isolates were F. gramineum;1 isolate was F. oxysporum;1 isolate was F. solani. Thirteen kinds of plants inoculated with F. moniliforme var. zhejiangensis indicated that 6 ones were infected, among the hosts, Sudan grass and soybean were two new ones. Rice cultivar 837 inoculated with 13 differential strains of F. moniliforme var. zhejiangensis indicated that strong pathogenic strains were 38.4%, middle pathogenic strains were 15.7%, other strains were weak pathogenic ones. Hibrid rice Shanyou 48-2 with 13 differential strains indicated that strong pathogenic strains were 23.1%, middle pathogenic strains were 30.8%, other strains were weak pathogenic ones.

Key words: bakanae disease of rice, Fusarium species, strain