As fall settles over Chattanooga and the Tennessee Valley, homeowners begin to notice signs of stress in their ash trees—thin crowns, bark splits, or unusual woodpecker activity. These could be symptoms of an unwelcome visitor: the Emerald Ash Borer (EAB). This invasive beetle continues to devastate ash tree populations across Tennessee, and now is the time to inspect, treat, or remove infested trees before winter.
This Fall 2025 EAB guide from Tree Worx LLC helps Chattanooga property owners identify EAB damage, understand treatment options, and take safe, effective action to protect their landscapes and neighborhoods.
What Is the Emerald Ash Borer?
The Emerald Ash Borer (Agrilus planipennis) is a metallic-green beetle native to Asia that first appeared in the U.S. in 2002. It has since spread to more than 35 states, including Tennessee. Adult beetles are small—only about half an inch long—but their larvae tunnel beneath ash bark, cutting off the tree’s nutrient flow and eventually causing death.
By the time symptoms are visible, an ash tree is often in serious decline. That’s why fall inspections are so important in Chattanooga’s climate, when leaf drop makes structural issues easier to see.
How to Identify EAB in Your Chattanooga Trees
Spotting early signs of EAB infestation can save a tree if action is taken promptly. During your fall inspection, look for:
- Canopy Thinning – Ash trees infested by EAB exhibit significant canopy dieback, starting at the top and progressing downward.
- Bark Splitting – Vertical splits in the bark reveal the larvae’s distinctive S-shaped tunnels underneath.
- D-Shaped Exit Holes – Adult beetles leave small, D-shaped holes (about 1/8 inch wide) when they emerge from beneath the bark in spring.
- Epicormic Shoots – New shoots or sprouts may appear at the base of the trunk or along large branches, signs that the tree is under stress.
- Woodpecker Activity – Increased woodpecker damage (flaked bark) often indicates they’re feeding on EAB larvae beneath the surface.
If you see one or more of these signs, call Tree Worx for a certified arborist inspection. Our team can confirm infestation using a combination of visual assessment and bark sampling.
EAB in Tennessee and the Chattanooga Region
The Tennessee Department of Agriculture and USDA APHIS confirm that EAB is present in multiple Tennessee counties, including Hamilton County. Since 2010, infestations have spread rapidly through both rural and urban forests, killing tens of thousands of ash trees statewide.
Locally, Chattanooga neighborhoods like Hixson, East Brainerd, and Ooltewah have reported significant ash decline, especially along roadways and greenways. City officials continue to monitor affected areas, but private property owners bear responsibility for managing their trees safely.
Treatment vs. Removal: How to Decide This Fall
Fall is the perfect time to evaluate whether your ash trees can be treated or should be removed before winter storms cause additional damage.
Option 1: Tree Treatment
If your ash tree still has more than 70% of its canopy intact, it may be a candidate for insecticidal treatment. Tree Worx uses professional-grade trunk injections containing systemic insecticides such as emamectin benzoate that target EAB larvae inside the bark.
Treatment Benefits:
- Protects high-value or mature trees.
- Lasts for 2–3 years with proper application.
- Environmentally safe when administered by a certified arborist.
However, once more than one-third of the canopy has died, treatment is unlikely to succeed.
Option 2: Tree Removal
If your ash tree shows extensive canopy loss, structural decay, or trunk instability, it’s time for removal. Dead or dying ash trees become brittle quickly, posing a danger to people and property.
Tree Worx’s ash tree removal services include:
- Crane-assisted takedowns for large or high-risk trees.
- Full debris removal and stump grinding.
- Safe operation near homes, driveways, and power lines.
Removing infested trees before winter prevents falling hazards during Chattanooga’s heavy rains and occasional ice events.
Preventing the Spread of Emerald Ash Borer
EAB spreads mainly through the movement of firewood and unprocessed ash logs. To prevent further infestations in Tennessee:
- Do not transport firewood across county or state lines.
- Dispose of infested material locally. Tree Worx can chip or safely haul away wood for proper disposal.
- Plant diverse tree species to restore canopy balance and reduce susceptibility to future pests.
Recommended Replacement Trees for Chattanooga
When removing infested ash, replanting with native or resilient species helps maintain Chattanooga’s tree canopy and ecological health.
Tree Worx recommends the following EAB-resistant trees:
- American hornbeam (Carpinus caroliniana) – Strong, compact, and shade-tolerant.
- Tulip poplar (Liriodendron tulipifera) – Tennessee’s state tree; fast-growing and hardy.
- River birch (Betula nigra) – Tolerates wet soils; beautiful exfoliating bark.
- Red maple (Acer rubrum) – Excellent fall color and adaptable to local soils.
How Tree Worx Can Help
Tree Worx LLC is Chattanooga’s trusted, safety-focused tree care provider, offering professional EAB management across Hamilton, Bradley, and Marion counties. Our certified arborists specialize in:
- Emerald Ash Borer inspection and identification.
- Treatment programs and preventive injections.
- Safe, insured ash tree removals with crane access.
- Native tree replanting recommendations.
We also assist with insurance documentation and municipal compliance for large-scale ash removals or HOA projects.
Frequently Asked Questions (FAQ)
Can an ash tree survive EAB infestation?
Yes, if detected early. Trees with minor canopy dieback can respond well to treatment within the first 1–2 years of infestation.
When is the best time to treat for EAB?
Fall and early spring are optimal treatment windows, as insect activity slows and systemic injections can circulate efficiently before dormancy.
Should I remove dead ash trees now or wait until spring?
Remove them before winter. Dead ash trees become brittle, making removals more dangerous and expensive later.
If you suspect EAB damage, don’t wait until your ash becomes a hazard. Schedule a fall inspection with Tree Worx LLC, Chattanooga’s trusted certified arborist team.
