[ Objective ] The study systematically studied the biological characteristics of ginseng Botrytis cinerea Pers. [ Method ] The pure pathogenic fungus was isolated from ginseng B. cinerea collected in the field by tissue segregation and purification cultivation. Subsequently, using PDA medium plate culture method, the effect of various culture conditions on mycelium growth and sporulation of ginseng B. cinerea was detected. [ Result] The optimum temperature for mycelium growth and sporulation of B. cinerea was 25 ℃. The appropriate temperature for conidia germination ranged from 20 to 25 ℃. And the optimum pH value for mycelium growth and conidia germination was 6.0. The optimum carbon source was sucrose, followed by glucose and fructose. The optimum nitrogen source was peptone, fol- lowed by beef extract, yeast extract, alanine and ammonium nitrate. Among the media, the growth of mycelium cultured on PDA medium was the fastest with the production of gray mycelium and dense colonies. Lethal temperatures for sclerotia, mycelium and conidia were 60, 55 and 50 ℃, respectively. [ Conclusion] The study provided the scientific basis for the research on the incidence law of B. cinerea and its control.
