Recently diagnosed, invasive species which can rapidly kill even the healthiest ash tree. It is estimated that it has already killed over sixty million ash trees in the United States already. The insect is one of the class of metallic wood-boring beetles. The main symptoms of an infested tree are branch die back, sprouting around the base of the tree, and unusual woodpecker activity. Other signs include d-shaped exit holes and if the bark is peeled back, a serpentine pattern packed with sawdust. Bark treatments and soil drenches are suggested.