Abstract: The effect of yeast mannan treatment on the growth of Monilinia fructicola in potato dextrose agar (PDA) medium and the brown rot disease of plum fruits was studied. In vitro experiments showed that yeast mannan treatment with different concentrations (5, 25, 50 g/L and 100 g/L) could obviously inhibit the growth of Monilinia fructicola hypha, and the inhibitory effect of yeast mannan treatment on the growth of fungi was in a concentration-dependent manner. In vivo tests showed that yeast mannan treatment could effectively inhibit brown rot disease of plum fruits inoculated with Monilinia fructicola before/after yeast mannan dipping. Yeast mannan treatment could also reduce the respiration intensity and weight-loss rate, and delay the color change of plum fruits stored at 23 ℃, which could maintain better storage quality of plum fruits.

Key words: mannan, plum fruit, brown rot disease, storage characteristics