Biological Characteristics of the Pathogenic Fungus Causing Anthracnose of Chrysanthemum coronarium

Biological characteristics of Colletotrichum chrysanthemi Hori.Saw,the pathogenic fungus causing anthracnose of Chrysanthemum coronarium were studied.The results showed that pathogenic fungus could grow on all six kinds of medias tested.It could also effectively use all kinds of carbon sources and nitrogen sources.The optimal carbon source was glucose and the optimal nitrogen source was peptone.The fungus could grow under 10～34℃ with suitable temperature range of 26～30℃,and the optimum temperature was 28℃.In the range of pH 3～9 it could grow and grow best in the environment of pH 7.The growth increment of pathogens under light conditions was significantly higher than in the dark conditions.The lethal temperature of it was 60℃ for 10 min.