Ash trees can become fixations for Emerald Ash Borers (EAB), the destructive insects that feast on wood. They live underneath tree bark, making them challenging, but not impossible, to detect. Here, review steps for inspecting your ash trees for EABs, and call your local arborists immediately if you suspect an infestation.

How To Inspect Your Trees for Emerald Ash Borers

1. Look for Woodpecker Activity

Stay aware of how many woodpeckers are hanging out on your property. While catching glimpses of the birds is exciting for enthusiasts, increased woodpecker activity can indicate EAB infestations. Woodpeckers consume Emerald Ash Borer larvae, as do other wood-forging birds, such as nuthatches.

2. See If the Crown Has Thinned

Observe the crown of your ash trees for thinning leaves. The trees will also feature fewer leaves on their sides if Emerald Ash Borers are present. Dead branches accompany thinning foliage, as EAB damage starts at the top and works its way down. Heavily infested trees often feature leafy shoots, or epicormic sprouts, around their bases due to stress.

3. Check for Dead Branches & Yellow Leaves

Look for additional branch and leaf damage after checking the canopy, such as dead branches and wilted, yellow foliage. Keep in mind that dead branches are hazardous, even if they aren’t hanging. They can fall off the trees during storms and potentially inflict property damage and injuries.

4. Examine the Bark Closely

Look for vertical cracks around the bark, which signal significant larvae activity, as well as D-shaped exit holes that are about ⅛” wide. These appear when grown Emerald Ash Borers leave the trees during June and July. Also, check for S-shaped “galleries” under the bark where the insects tunnel. 

If you believe your trees are infested with Emerald Ash Borers, contact Dave & Aaron Stang's Certified Tree Care. Serving the Greater Cincinnati, OH, area since 2003, the team members are certified arborists who follow ISA standards and have at least three years of industry experience. Call (513) 936-9777 today to make an appointment or visit the arborists online for additional information. Add tree care tips to your feed by liking the business on Facebook.