Biological characteristics of the pathogenic fungus causing anthracnose in fingered citron

A fungus causing fingered citron anthracnose was isolated and identified as Colletotrichum gloeosporioide.It was showed that the pathogenic fungus had high adversity survival skills,enduring acid and alkali and high temperature.Under experimental conditions,the mycelia of the pathogenic fungus grew most quickly on the semi-synthetic medium PDA and slowly on the synthetic medium CZ.The optimum temperature for its mycelia growth and conidia germination were 25 ~28 ℃ and 20 ℃ respectively and the optimum pH were 7~9 and 6~9.Complete darkness was better for mycelia growth than with light or half-light.The lethal temperature for this fungus was 60 ℃,10 minutes.When the concentration was 0.1%,glucose promoted obviously conidia germination.The results would be helpful for pathogen infection mechanism research and disease control.