Emerald Ash Borer has been working through Northeast Ohio for over fifteen years. If you have ash trees on your property and haven't had them assessed recently, there's a real chance they're already infected — and a smaller window than you think to save them.
Here's what you need to know.
What Emerald Ash Borer Does to a Tree
EAB is a small metallic green beetle that lays eggs under the bark of ash trees. The larvae tunnel through the inner bark and sapwood, cutting off the tree's ability to move water and nutrients. The tree doesn't die all at once — it declines over 2–4 years, losing the upper canopy first before failing completely.
By the time most homeowners notice something is wrong, the tree has already lost 30–50% of its canopy. That's often still treatable. By the time it's lost 70% or more, the math on treatment stops making sense.
Signs Your Ash Tree Has EAB
S-shaped galleries under the bark. If you peel back a section of loose bark on a declining ash, you'll see the winding tunnels the larvae leave behind. This is the most definitive sign.
D-shaped exit holes. Adult beetles emerge through D-shaped holes approximately 3–4mm wide — roughly the size of a pencil eraser. These appear on the trunk and major branches.
Canopy thinning from the top down. EAB kills the upper canopy first. If your ash is losing leaves and branches starting at the top, investigate immediately.
Epicormic sprouting. Stressed or dying ash trees often push out clusters of small shoots along the trunk and major limbs — a last-ditch effort by the tree to replace lost canopy.
Woodpecker activity. Woodpeckers hunt EAB larvae aggressively. Heavy woodpecker damage on an ash tree — especially "blonding," where birds strip bark in search of larvae — is a reliable indicator of infestation.
Can the Tree Be Saved?
Yes — if it's caught early enough and treatment is applied correctly.
The standard treatment is a systemic insecticide (most commonly emamectin benzoate injected directly into the tree, or imidacloprid applied as a soil drench). These treatments work by moving through the tree's vascular system, killing larvae as they feed.
Treatment is realistic when the tree has lost less than 50% of its canopy. Trees with more advanced decline have insufficient vascular function to distribute the treatment effectively.
Treatment needs to be repeated every 2–3 years depending on the product used. It's not a one-time fix — it's an ongoing protection program for a tree you've decided is worth keeping.
When Treatment Doesn't Make Sense
Not every ash tree is worth treating. The calculus changes if:
- The tree has already lost more than half its canopy
- The tree has structural defects (rot, major cracks) that make it a hazard regardless of EAB
- The tree is in a poor location — too close to the house, utility lines, or structures
- The cost of multi-year treatment exceeds the value of the tree to your property
When treatment isn't viable, removal is the right call — and sooner is better. A dead ash becomes brittle and unpredictable faster than most species. The wood dries out, becomes punky, and makes removal significantly more complicated and expensive. A live ash that needs to come down is a much cleaner job than a dead one.
Ash Tree Removal Cost in NE Ohio
If your ash has passed the point of treatment:
- Small ash (under 30 ft): $200–$450
- Medium ash (30–50 ft): $450–$900
- Large ash (50+ ft): $900–$1,500+
Dead ash trees can run 20–30% higher than living trees of the same size due to the unpredictability of brittle wood. The earlier you act, the cleaner and cheaper the job.
What to Do Right Now
If you have ash trees on your property in Greater Cleveland, Strongsville, Parma, Westlake, Medina, or anywhere across NE Ohio — get them looked at. If they're healthy, we can discuss whether preventive treatment makes sense. If they're already in decline, we'll give you an honest assessment of whether treatment is realistic or removal is the better call.
Frequently Asked Questions
How do I know if my tree is an ash? Ash trees have compound leaves with 5–11 leaflets arranged in opposite pairs, deeply furrowed bark in a diamond pattern on mature trees, and distinctive paddle-shaped seeds (samaras) that hang in clusters. If you're unsure, send us a photo or we'll identify it on-site.
Is EAB treatable with store-bought products? Homeowner-grade imidacloprid products (sold under brands like Bayer Tree and Shrub) offer some protection for small trees. For larger trees, professional trunk injection is significantly more effective. If the tree is worth saving, professional treatment is worth the cost.
How long does EAB treatment take? Trunk injection takes about an hour per tree. Soil drench applications are faster but have a slower uptake. Most professional treatments begin showing results within 4–8 weeks.
Can I replant with another ash after removal? We'd recommend a different species. EAB pressure in NE Ohio remains high, and replanting ash in an area with active EAB puts the new tree at immediate risk. White oak, sugar maple, and American linden are excellent ash alternatives for NE Ohio.
Does insurance cover EAB removal? Generally no — most homeowner's policies treat pest damage as a maintenance issue rather than a covered peril. There are exceptions if a dead or dying ash falls and damages a structure.
Unsure about your ash trees? Call 216-551-6445 — Joseph will come out and give you a straight read on what you're dealing with.
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