Bilolgical Characteristics of Pathogenic Fungus Causing Brown Spot on Mulberry Leaves

Through cultivating pathogenic fungi of mulberry brown rot disease under 6 conditions such as different media,temperature,carbon source and nitrogen source after 6 days,research on the biological characteristics of pathogenic fungus causing brown spot on mulberry leaves was conducted. The results showed that nutrition,temperature and pH had significant influence on mycelial growth. It was found that the best medium for mycelial growth was oatmeal medium,the proper temperature was 20 ~ 30℃,the optimal temperature for mycelial growth was 25℃,the light had no obvious promotion effect on mycelial growth. It was also found that the optimal pH was9 to 10,the best carbon source and nitrogen source for mycelial grow are α-Galoctaose and Carbamide,and the mycelial could not survive above 55℃ more than 10 min.