The larva is dull white with a brown head and three pairs of short jointed legs. Life Cycle Peachtree borer has only one generation per year. It overwinters as an inactive larva under the bark, and resumes feeding and completes its larval stages in spring and early summer. When fully grown, the larva pupates under bark or in the soil near the tree base, then emerges as a new adult. The adult is the only stage that leaves the tree.
Emergence is greater on days after a rain.
Soon after adults emerge, the female moths lay eggs under bark scales or on rough bark. Each female lays about 400 eggs. Eggs hatch in eight to ten days into larvae that bore into the tree. Monitoring While pruning in early spring, growers should look for symptoms of peachtree borer activity at the base of the tree. If symptoms are found, then a more intensive control strategy is needed than if symptoms are not found.