Abstract: The influences of different molecular weights and different concentfations of chitosans on the antifungal effects to preserve strawberry fruits were studied.Using t(putrefaction rate) to examine the difference of antifungal effect it was found that chitosan with 10-100 thousand molecular weight and 2% concentration had the optimal antifungal effect for preserving strawberry fruits.

Key words: Chitosan Antifungal Strawberry Fruits