| This paper aimed to study the biological characteristics of the pathogen (Pestalotiopsis maculiformans)causing leaf blight on Gardenia jasminoides Eills in Guizhou province, the effects of temperature, illumination, pH, nutritional condition on the mycelium growth and the germination of conidiospore (sporulation) of the pathogen were explored, the study of this paper systematically made a research on the biological characteristics of Pestalotiopsis maculiformans, it could provid a theoretical basis for the prevention and control of the Gardenia disease. The temperature range was 10~35℃for the mycelia growth and the conidiospore germination of the pathogen, the optimal temperature for mycelia growth and conidiospore germination was 25℃. The mycelia grows well and sporulation under the full light or light/darkalternation. The optimal pH was 5~6 for mycelia growth and conidiospore germination and the optimal culture medium for mycelia growth and conidiospore were PDA, PSA and so on, The pathogen could use monosaccharide, disaccharide, polysaccharide,and the pathogen could use organic and inorganic nitrogen. |
