Abstract：A total of 3, 690 isolates of Magnaporthe oryzae were collected from Guangdong province during 2006-2015 and were identified. The results showed that 8 groups and 51 physiological races were identified by inoculating them onto Chinese differential varieties of rice. Among them, ZB, ZC and ZG were the dominant groups, whereas ZB group showed the highest frequency with an average frequency between 48. 44% and 75. 35% with regard to the physiological race, ZB13, ZB15, ZC15, ZC13 and ZG1 were the dominant races, among them, ZB13 had the highest frequency of 32. 47%.
2018, Vol. 31 
