Emerald Ash Borer
Boring insects feed within tree trunks or branches. Some species like flat-headed borers feed between the bark and wood in vascular tissue. This often restricts the movement of water and nutrients and girdles the tree. Emerald ash borer is an exotic flat-headed beetle that feeds only on ash species.
If you have ash trees in your yard, it’s important to routinely monitor them for any signs of infestation or deterioration. For example, you may notice fewer leaves emerge in the canopy in the spring. In most cases, it’s best to be proactive and treat your ash trees before they become infested. Currently, the only option to treat ash trees is to use chemical insecticides.