First generation larvae will cause the small peaches to drop off the tree. Peaches infested during mid-season will not drop from the tree. Infested fruit tends to ripen a few days earlier than uninfested fruit. However, when these peaches are cut open, one or more legless, white worms with brown heads will be found feeding inside the fruit. When mature, the larvae cut a hole in the fruit and drop to the ground and pupate in the soil.
Adults emerge from the soil, move into the trees, and if fruit is present, start the process over.
Also, pick up any dropped fruit and destroy it. If there is fruit on the tree during mid-June, apply two more insecticide sprays. Remember, follow label directions about rates, safe application and preharvest carefully. Always take precautions when using any pesticide.