Methods to preserve fruits and vegetables with Chinese herbal extracts

The freshness-keeping effect will be better when fruits and vegetables are treated by natural Chinese herbal extracts. The major methods applied with the extracted substances are dipping, fumigating, spraying, as preservative paper and coating agents.

Dipping in the Chinese herbal extracts

Early studies mainly focused on how the ordinary aqueous extracts of natural plants act to preserve fruits and vegetables after they are dipped. Wu et al. used wintergreen extracts with 3 different concentrations to dip apples with brown rot under room temperature. It came out that these 3 extracts suppress and delay more or less the further infection of brown rot towards the apples, the higher concentration the better effects. Duan et al. chose the extracts of honeysuckle, Rheum officinale and galangal as three Chinese herbal medicines to preserve cucumbers. The final data indicated that the…

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