earticle

영어

Two species entomopathogenic fungi most widely used and valued in traditional Asian medical practice are Ophiocordyceps sinensis (formely Cordyceps sinensis) and Cordyceps militaris. Although O. sinensis may be the more famous and expensive fungus, it is also comparatively rare and cannot be grown or made to fruit readily in culture whereas C. militaris occurs worldwide, can be easily cultured, and is the easist of all Cordyceps species to fruit in culture. There is a well establihed cottage industry in Korea to produce C. militaris as a dietary supplement or even as a culinary ingredient used to promote improved health. Most of the Korean farmers raising C. militaris obtain fruiting bodies from silkworms that are injected with suspensions of hyphal bodies grown in liquid cultures.
This study seeks to facilitate and to simplify the injection process used to produced this fungus by finding a simple cullture medium on which abundant supplies of the Lecanicillium conodial state of C. militaris are produced and can be used with simplified injection protocols involving spraying or dipping in conidial suspensions than the more material- and labor- intensive injection protocol. The studies to be repored include quantitative tests of conodial yields on varying carbon sources, varying nitrogen sources, and attempted to optimize the carbon/nitrogen ratio and pH of the medium for conidial production.