Seven Signs of Emerald Ash Borer Damage

Emerald ash borer is a serious pest infestation that can quickly kill trees and spread to others nearby. If you suspect these beetles are overtaking your trees, confirm your suspicions quickly and begin treatment as soon as possible. If the pest damages more than 50% of the tree, it will likely be beyond saving. spread to others nearby

Keep an eye out for these signs of emerald ash borer damage. Contact Franklin Tree Service to discuss tree removal services in Franklin, TN, and other potential treatment options. 

signs of emerald ash borer damage

1. D-Shaped Holes in the Bark

D-shaped exit holes in the tree bark often indicate the presence of an emerald ash borer infestation already in progress. These holes appear when the EAB larvae exit through the bark as adults. Look closely at the tree for any signs of bark splitting or holes.  

2. S-Shaped Larval Galleries Under the Bark

Emerald ash borers create tunnels through the tree as they feed on the bark and wood. These tunnels are often shaped like an S and appear under the bark. Look for signs of tunneling, indicating that a pest is feeding inside the tree. 

3. Metallic-Green Beetles 

Adult emerald ash borers are about a half-inch long, one-sixteenth of an inch wide, and metallic-green in color. While most of the damage comes from EAB larvae, you may still spot adults nearby. 

4. Canopy Thinning 

EAB can cause significant damage to trees. If you notice the tree canopy thinning during the growing season, the tree is likely declining. This, combined with other signs of emerald ash borer damage, should warrant a prompt call to a certified arborist. 

5. Epicormic Shoots 

Trees infested with emerald ash borers often develop epicormic shoots, which are shoots that emerge from dormant buds on the bark or branches. Trees often develop epicormic shoots as a response to stress. The purpose is to aid the tree’s regrowth process, but unfortunately, this response often does not do much good after severe EAB infestation. 

6. Increased Woodpecker Activity

If you notice an increase in woodpeckers around your property, particularly on ash trees, this may indicate the presence of emerald ash borers. Woodpeckers eat EABs. While these birds can help control the pest infestation, they typically cannot eradicate the pests completely. 

7. Crown Dieback 

A tree’s crown includes the leaves and branches near the top. Under normal conditions, the crown stays lush and full. If you notice the crown beginning to thin or die, this indicates that the tree cannot pull enough nutrients through the roots and up to the branches and leaves.

Emerald ash borers are a common culprit for nutrient disruption, but this effect can occur from a range of other tree ailments as well. 

Call Franklin Tree Service for Tree Health Solutions

Seeking treatment promptly is the best way to save a tree suffering from emerald ash borer infestation. If you notice any of these signs of emerald ash borer damage or you are unsure whether your tree is struggling, call Franklin Tree Service today. Contact us at 615-866-7056 to request a free estimate. 

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