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Poster: Biology & Disease Mgmt: Biological Control


Isolation and Characterization of Paenibacillus spp. for Biological control of Ginseng root rot
F. ROTONDO (1), B. McSpadden Gardner (2), P. Paul (1) (1) The Ohio State University, Wooster, OH, U.S.A.; (2) The Ohio State University, Wooster, U.S.A.

Ginseng(Panax ginseng C. A. mayer) is one of the most valuable medical crop in Korea. Ginseng is grown in the same field under shade for at least four years to produce high quality root. Ginseng root rot caused by Cylindrocarpon destructans which can result in yield loss reached up 60 percent, is the main factor of replant failure. The aim of this study is to find out bio-control agents from rhizosphere soil for environmentally friendly control of root rot. More than one thousand soil bacteria were isolated from ginseng field and tested antifungal activity and biochemical property. Among them, five strain was selected and assessed in vitro against Botrytis cinerea, Cylindrocarpon destructans, Fusarium solani, and Rhizoctonia solani. Paenibacillus strain ES17 showed strong growth inhibition against these pathogen and produced cellulase, pectatelyase, and xylanse. This results indicated that selected strain can be used as efficient bio-control agents to control ginseng root rot.