Identification of a Pathogen from Corynespora Leaf Spot Disaese of Cassava and Its Biological Characteristics
A new leaf spot disease was first found in the main cassava planting regions during a survey in 2009. Morphlogical identification and ITS sequence analysis indicated the pathogen was Corynespora cassiicola, which was named CCCHN01. The optimal condition for the mycelial growth included CMA or ME medium, 26 ℃ to 28 ℃, pH 6 and continuous light. Alternative light or continuous light was the the optimal condition for sporulation. The optimal temperature for conidia germination was 28 ℃ to 30℃ and the lethal temperature was 55 ℃ for 10 min. Five strains including CCCHNO1, two strains from papaya and the others from rubber trees could infect cassava and papaya with different virulence. All strains except the strain from papaya could infect rubber trees .
国家科技期刊平台
NSTL
万方数据
维普
