Ginseng radix (Panax ginseng C.A.Meyer) has been known as the oriental medicine with maintenance of physical vitality.The yield of 4-to 6-year-old ginseng in the farm-field is less than 50% due to various diseases caused by soil-borne pathogen such as Cylindrocarpon desructans,Rhizoctonia solani,Phytophthora cactorum,Botrytis cinerea,Fusarium solani and Alternariapanax.Few mountain ginseng has been found in Korea each year.Some of them were over 100-year-old ginsengs without any disease.