R. mucilaginosa works as a nutrient competitor, may consume sugar in the face of strawberry fruit, however, no matter it was used only or combined with PA at the concentration of 4 mmol/ml, did not decrease total soluble solids (which composed mainly of soluble sugar) of strawberry fruit (our unpublished data). Since that PA has no risks to humans and to the environment, and that PA is a cheap and widely available natural component, the utilization of PA might be an effective, safe and economic approach to enhance the biocontrol efficacy of R. mucilaginosa to postharvest decay of strawberries.