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A large number of common herbs possess antimicrobial activity, because of their bioactive components, and some of them have become new potential anti-infective agents. In the present study, the antifungal activity of the essential oil from Ginger (Zingiber officinale Rosc.) was tested. The compositions of the oil was analyzed by GC/MS. Minimum inhibitory concentrations (MIC) against six pathogenic fungi causing ginseng root rot disease were determined for the essential oil. Ginger essential oil possessed significant antimicrobial effects against all phytopathogenic fungi tested. Only 0.3 % (v/v) concentration of ginger oil exhibited complete inhibition against Alternaria panax, Botrytis cinerea, Cylindrocarpon destructans, Fusarium oxysporum, Sclerotinia sclerotiorum, and Sclerotinia nivalis. The major constituents of ginger (Zingiber officinale) oil were citral (2, 6-octadienal, 3, 7-dimethyl) (76.94%), verbenyl ethyl ether (3.98 %), geranic acid (2.57%) and artemiseole (1.12%). The results of this investigation show evidence that the essential oil of ginger represent a potentially rich source for natural antimicrobials and may be useful as alternative anti-infectious agent to control ginseng root rot fungi.

Antifungal activity and chemical composition of ginger essential oil against ginseng pathogenic fungi