Emerald Ash Borer
The emerald ash borer, Agrilus planipennis, is a bark-boring beetle native to East Asia. The beetle targets ash trees (Fraxinus spp.) and was introduced to the United States a decade ago through the wood used in shipping crates from China. Emerald ash borers feed on the tissues under the tree bark, out of sight, and can kill an ash tree within two to four years after the initial infestation. The beetles, by feeding on the tree’s tissues, disrupt the tree’s ability to transport nutrients and water to the photosynthesizing leaves. The emerald ash borer is transported to new areas through the movement of infested wood such as firewood, nursery stock and other ash tree products.
The emerald ash borer is bright, metallic green with a flattened back. Underneath the wing covers, the beetle has metallic purple abdominal sections. The larvae of the EAB are creamy white and legless with bell-shaped segments body segments. The emerald ash borer often causes canopy dieback, epicormic shoots, and bark splitting. As the length of the infestation increases, the ash trees drop increasingly more leaves and experience increased woodpecker activity and damage. Under the bark of the tree, the beetle creates large tunnels or feeding galleries that weave back and forth across the grain of the wood. As the adult beetle emerges from the ash tree, they leave a recognizable D-shaped hole.
If you suspect you have found an emerald ash borer or an infested ash tree, please contact DPI at firstname.lastname@example.org or 864.646.2140.