Biological Characteristics of Cercospora eriobotryae in Photinia

The mycelium growth of CE08 Cercospora eriobotryae strain and its conidium germination condition of pathogenic bacterium were studied by mycelium growth rate and pendant-drop methods to provide the theoretical basis for effective control of brown spot in Photinia.The results showed that the optimum medium,temperature and pH for mycelium growth of CE08 strain were PAS,25℃ and 7～8 respectively,the optimum temperature,pH and humidity for its conidium germination were 30℃,6～7 and more than 85% separately,and the pendant-drop method could promote conidium germination effectively.