Isolation,Purification and Pathogenicity Identification of Rice Sheath Blight from Sichuan Province

Fifty-five rice sheath blight samples were collected in rice from five distinctive ecological regions of Sichuan province. The 55 representative samples were isolated and purified,and field pathogenicity identification were analyzed. Pathogenicity identification analysis indicated that the pathogenicity among the strains were significantly different. Different pathogenic fungi and different resistance rice race had the pathogenicity significant different from the 55 counties.The results showed that we would find rice sheath blight and pathogenicity distribution characteristics,in order to control the rice sheath blight epidemic and reduce the infection to rice or maize. Finally, it would provide reference to select the high resistance to rice sheath blight breeding samples and gene resoures.