Adult damage also provides entry sites for fungal rots. Larvae tunnel and feed inside developing fruit. Most fruit infested early in the season drop prematurely. Fruit infested later in the season are of no market value due to the presence of the grubs. They become active shortly before peaches bloom.
Adults fly to trees, mate, and lay eggs.
Females deposit each egg in a hole under a crescent-shaped cut eaten in the fruit. Eggs hatch in about five days. Grubs feed in the fruit for eight to 22 days. Mature larvae tunnel out of the fruit, enter the soil, construct small earthen cells and pupate after about two weeks. There are usually two generations and possibly a partial third generation each year.