Gray mould decay caused by the phytopathogenic fungus Botrytis cinerea is a serious problem in the world of
crop production. Although the applications synthetic fungicides are currently effective for management of the
disease, these methods have been prohibited in organic agriculture. Therefore, developments of alternative
strategies, which better comply with organic agriculture standards, are needed. Of various strategies proposed,
biological control using microbial antagonists is a promising strategy (Chan and Tian, 2005). During the past
decade, many microorganisms have been reported to suppress the pathogenic activities of B. cinerea and the
development of gray mould symptoms on certain crops. Among them, antagonistic yeasts are the most promised
according to their basic properties, especially as they are generally recognized as safe to human. Yeasts
generally do not produce allergenic spores, toxins or hazardous metabolites which posing risk to consumers