Study on the biological characters of the pathogen of mango red spot disease Colletotrichum sp..
Qin LiPing, Huang SiLiang, Yu LiHua, Lin ChangHe, Hu ChunJin, Lin ShanHai
Author Affiliation: Microbiology Research Institute, Guangxi Agricultural College, Nanning, Guangxi, China.
South China Fruits : 11-14
Abstract : Red spot disease is a new disease for mango discovered in recent years. At the first stage many round little brown or black spots with red or dark red blush ring appearing on the fruitlet, then the ring disappeared, but appearing brown or black split on the fruit skin, made it losing edible value. Study revealed that caused this disease was the Colletotrichum sp.. The suitable temperature for its hyphae growth and conidia were 13°C to 37°C, with the optimum temperatures of 25 to 31 °C; the suitable pH range for mycelial growth, sporulation and conidial germination were 3.0-11.0 with the optimum of pH 4.0-8.0. PSA medium was the best one for mycelial growth while PSA plus yeast extract (9 g/L) was the best for sporulation.