The Emerald Ash Borer (EAB) is a small (1/2” long, 1/8” wide) metallic green beetle. It is an invasive species and infestation is highly destructive to ash trees.
The EAB travels by the movement of firewood and nursery stock. The adult beetle can fly up to a half mile under its own power.
The Adult EAB emerges May-July and the female lays numerous eggs in bark crevices and between layers of bark. The eggs hatch into larvae in 7-10 days which bore into the tree where they chew the inner bark creating winding galleries in the vascular tissue of the tree as they feed. This action cuts off the flow of water and nutrients in the tree, causing dieback and death of the tree.