Pest description and damage Peach tree borer is native to North America and common in the Pacific Northwest. The adult is a metallic blue-black, clearwing moth. The male moth may have bands of light yellow scales on the abdomen, and resemble a wasp. The female has an orange band around the abdomen. Full-grown larvae are 1.0 inch long and whitish with a brown head. The larvae burrow into the bark of the crown and feed on the cambium. Feeding and tunnels are restricted to an area a few inches above and below the soil line. Peachtree borer feeding damage can completely girdle and kill young trees. While older trees are rarely girdled, the damage reduces vigor and makes them vulnerable to other pests and diseases. Infested trees "bleed" a reddish amber frass and gum mixture during the growing season.
For biology, life history, monitoring and management
Peach, flowering (Prunus)-Peachtree borer
See Table 4 in: