Emerald Ash Borer

You can identify damage to your Ash trees by the Emerald Ash Borer if you see increased woodpecker activity, D-shaped exit holes 1/8th inch wide, new sprouts at the trunk or lower limbs while the upper part of the tree has sparce leaves and/or branches. Also look for vertical splits in the bark and winding S-shaped tunnels under the bark.

EAB adults are about ½ inch long with a metallic, emerald-green head and back and a coper red-purple abdomen. Adults consume ash foliage and are present May through September. Females lay eggs in bark crevices that develop into worm-like larvae in the fall. The larvae girdle the tree and disrupt the movement of water and nutrients.

The Denver metro area has about 1.45 million ash trees.

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