Resistance identification of sheath blight for traditional varieties of maize in Guangxi

The resistance identification of sheath blight for 388 traditional varieties of maize was carried out in the field for two years in Guangxi.The inoculation identification method is as fellows: the sheath blight cultivated in barley-medium was inoculated to maize in the field during the elongation stage,and was identified by the disease grading standard of CIMMYT.The results showed that the resistance of disease affection among these traditional varieties was different,and the disease of each variety was also obviously different between spring planting and autumn planting in a year.The immune and high resistant varieties were not found,the percentage of disease-resistant varieties was 42.8%,moderate resistant varieties was 39.2%,disease susceptible varieties was 11.3% and highly susceptible varieties was 6.7%.