The red-headed ash borer (Agrilus auctorum) is a destructive wood-boring beetle that attacks both living and dead trees, including all species of ash (Fraxinus spp.). This invasive pest is native to Asia and was first detected in North America in 2002. Since then, it has spread to at least 13 states and two Canadian provinces.
The red-headed ash borer adults are about 1/2 inch long with metallic red heads and black bodies. The larvae are creamy white with brown heads and can reach up to 1 inch in length. Both adults and larvae feed on the inner bark of ash trees, causing the tree to starve and eventually die.
There is no known cure for an infestation once it has begun, so early detection and prevention are critical to saving our ash trees from this devastating pest. If you think you have spotted a red-headed ash borer, please contact your local extension office or state forestry agency immediately.