The peachtree borer overwinters as larvae on or under the bark of trees, usually below the ground level. When full grown, the larva constructs a cocoon and pupates, usually during late May and June. Moth emergence begins in early July and continues into September. The moths mate immediately after emerging and the female begins to lay eggs within 30 minutes. The majority of eggs are deposited the day of emergence and mating.
Females lay few eggs after the third day.
The egg incubation period averages nine to 10 days during warn summer days and up to 15 days during colder periods. The young larvae bore into the bark at the base of the tree. Once beneath the bark, they feed on the cambium and inner bark of the tree. Generally only one generation occurs each year in the north central states. Some larvae, however, may require two years to complete development.