Abstract:

Abstract:The resistance of 18 leading rice varieties in Fujian Province to rice blast disease were assayed under the condition of spray inoculating and nature induce. The results showed that the ratio of resistant varieties, susceptible varieties to Magnaporthe grisea in seedling stage were 61.1% and 38.9%, respectively. There were 2 resistant varieties, 12 middle-resistant varieties, 2 middle-susceptible varieties and 2 susceptible varieties to leaf blast with the ratio of 11.1%, 66.7%, 11.1% and 11.1%, respectively. Guyou 527, Jiafuzan,Teyou 627 showed resistance (R) to panicle blast, and 10 leading rice varieties showed from susceptible (S) to high-susceptible (HS) to panicle blast, such as Jinmingyou 100, Ⅱyou936, Teyou 009, Shanyou 63, Weiyou77, etc. In addition, Interlocal meteorological factors was not the main reason for differences in resistance of leading rice varieties to rice blast disease, and microclimate condition was important environmental factor which affected rice blast disease.