Neoclytus caprea . (shown adult) Banded Ash Borers infest weakened, dying, and recently dead ash trees, but are most destructive to recently cut sawlogs. They occur throughout most of the United States, but are most common in the East.
Adults are elongate, tapered in form, and vary from 4 to 18 mm in length. The banded ash borer is black with yellowish-white bands. Larvae of both species are creamy white, short, robust, and 10 to 22 mm long. Round adult exit holes in the bark and wood and mines under the bark are evidence of infestation. The principal injury is from larval tunnels in the sapwood; the oval tunnels are tightly packed with frass. Injury to recently felled trees and logs is often confined to the shaded bottom half.
