Abstract: The culture conditions for the production of antagonist by Bacillus sp. X-98-2 and the effect on preservation of mangowere investigated. The results showed that the optimal culture conditions were 0.3%glucose, 0.5% peptone ,0.3%immersed beefcream, 0.1% NaCl and 0.1% (NH4)2SO4, pH7.0, at 28℃ for 48h. The leavening had a good effect on preservation of mango inmany aspects, such as preventing fruit stem-end falling off, postponing the seedcase to turn yellow, inhibiting the metabolism,reducing the respiratory intensity, keeping the weight, and so on.

Key words: Antagonistic microorganisms, Bacillus, mango, preservation, Colletotrichum gloesporioides