Ask the Produce Docs (Consumers)

Cut apples can be dipped in citrus juice like orange or lemon juice to reduce browning. You can also purchase powdered citric acid that can be sprinkled on the surface to reduce browning.

You only need to dispose of the moldy fruit, then rinse and dry the remaining fruit to remove any mold spores that may have gotten on the surface to reduce the likelihood that more fruit will mold.