Pear (P. bretschneideri Rehd.) fruits at commercial maturitywere bought from local market in Xiasha district, Hang Zhou,China. After disinfection by 2% sodium hypochlorite, the fruits werewounded at the equator using the tip of a sterile dissecting nee-dle and inoculated with 10 L P. expansum spore suspension at1.0 × 104spores/mL. Before inoculation, spores were cultured shak-ily in PDB containing 0 or 0.6% NaHCO3for 6 h at 25◦C. The decayincidence and lesion diameter of all fruits were recorded after stor-age for 3 to 8 days. There were 15 fruits in each treatment withthree replicates and the experiment was repeated.