Inhibitory Effects of Chinese Herbal Extracts on Postharvest Fungul Rot of Broccoli

The inhibition effects of chinese herbal extracts against Alternaria alternate and Sclerotinia sclerotiorum causing decay of postharvest broccoli were studied in this paper. The antibacterial effects of different Chinese herbal extracts were compared by growth rate and filter paper methods. Then the living verification test was used on broccoli. The species of Chinese herbal showing good inhibitory effects were selected and their minimal inhibition concentration(MIC) and minimal bactericidal concentration(MBC) were investigated by dilute with grads.The results showed that different natural plant extracts had different inhibitory effects against the microbes in postharvest broccoli. Subprostrate sophora and myristica fragrans were the better kinds showing inhibitory capability against Alternaria alternata and Sclerotinia sclerotiorum among 15 kinds of natural plant material. The MIC of the extracts of Subprostrate sophora and myristica fragrans for Alternaria alternata were10%(V/V). And the MBC of Subprostrate sophora and myristica fragrans extracts for Alternaria alternata were 20% and 40%,respectively. For Sclerotinia sclerotiorum,the MIC of subprostrate sophora and myristica fragrans extracts were 20% and 10%(V/V),respectively,and the MBC of subprostrate sophora and myristica fragrans extracts were 40% and 20%,respectively.