Control of Soil-Borne Pathogens in Ginseng Cultivation through the Use of Cultured Green Manure Crop and Solarization in Greenhouse Facilities

Background: Root diseases caused by Cylindrocarpon destructans and Fusarium solani decrease the yield and quality of ginseng. Cylindrocarpon root rot is a major disease caused by replant failure in ginseng fields. Methods and Results: Solarization of infested greenhouse soil was carried out during the summer season after applying green manure (Sudan grass) and Calcium Cyanamide (CC) on the soil. Mycelium and conidia of C. destructans died at after 15 h, but they did not die at after 15 h. They also died after keeping the soil at for 2 h daily for 9 days, and at for 8 days, but they did not die at for 9 days. Maximum soil temperature was at 5 cm depth, at 10 cm, at 15 cm, at 20 cm, and at 30 cm by incorporating green manure into the soil and using solarization. Solarization using green manure mixed with CC was the most effective in decreasing soil-borne pathogens of 2-year-old ginseng. However, the addition of CC decreased the root weight due to the increase in EC and . Conclusions: Soil disinfection using green manure and solarization in a greenhouse environment was effective in inhibiting root rot, however, it did not completely kill the soil-borne pathogens.