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Emerald Ash Borer Treatment in Columbia, MO
EAB has killed millions of ash trees across Missouri — and it's established in Boone and Callaway counties. Early treatment is the only option. Once infestation progresses past a certain point, removal is the only answer. Tree Wizard evaluates ash trees and treats those still worth saving.
- ISA Certified Arborist
- EAB Evaluation & Treatment
- Trunk Injection Available
- Locally Owned Since 2003
What You're Dealing With
EAB Is Established in Central Missouri
Emerald Ash Borer arrived in Missouri in 2008 and spread quickly. It's now confirmed throughout Boone and Callaway counties. Every ash tree in the Columbia area is at risk — there are no EAB-free zones in Central Missouri anymore.
The beetle's larvae feed on the tissue beneath the bark that transports water and nutrients. An infested tree is essentially being starved from the inside. The process is slow enough that visible symptoms often appear late — by the time a homeowner notices canopy dieback, the tree may already be beyond treatment.
How to Identify an Ash Tree
Ash trees have compound leaves with 5–9 leaflets in opposite pairs, diamond-patterned bark on mature trees, and distinctive paddle-shaped seed clusters (samaras) that hang in bunches. If you're not sure, have us take a look — not every tree with yellow leaves in fall is an ash.
Signs of EAB Infestation
D-shaped exit holes in the bark (about 1/8 inch wide), S-shaped galleries visible when bark is peeled back, canopy dieback starting at the top and progressing downward, bark splitting or sloughing off, heavy woodpecker activity, and epicormic shoots (sprouts) from the trunk base are the key indicators.
How Fast Does EAB Kill?
An untreated, infested ash typically dies within 3–5 years of initial infestation. The timeline varies by tree size and health going in. Early detection and treatment can extend the tree's life indefinitely with continued treatment cycles; late-stage infestation cannot be reversed.
When Treatment Is No Longer Viable
The standard threshold is 50% canopy remaining. Below that, the tree's vascular system cannot support treatment uptake and recovery. A certified arborist assesses each tree individually — canopy loss isn't the only factor, but it's the most reliable indicator.
Your Options
Treat, Remove, or Wait — We'll Tell You the Truth
The right call depends on your tree's condition, its location on your property, and what matters to you. Here's how we think through it:
- Treat — if the tree has 50% or more canopy, is healthy otherwise, and has real value (shade, location, size). Treatment costs less than removal and gives the tree years more life.
- Remove — if the tree is already past the treatment threshold, is dead or near-dead, or is a small tree with low property value. Dead ash becomes brittle fast; the longer you wait, the harder and more dangerous removal gets.
- Monitor — if the tree shows no symptoms yet and you want to defer treatment until signs of infestation appear. Some owners choose this for trees far from structures with lower stakes.
We don't recommend treatment for trees that won't benefit from it. If we tell you to remove it, that's the honest answer.
Treatment Methods
How EAB Treatment Works
Trunk injection is the most effective treatment method for established trees. The chemical is injected directly into the vascular system, where it's carried throughout the tree. Injection treatments typically protect for two years and have the best efficacy data of any EAB treatment method.
Soil drench applications are another option for certain sites — particularly where access for injection equipment is limited. Systemic uptake through the roots can be effective, though efficacy and timing requirements differ from injection.
Our certified arborist evaluates your tree and recommends the appropriate method. We don't apply a one-size approach — treatment protocol depends on tree size, site conditions, and infestation stage.
Dead Ash Trees
If Your Ash Is Already Gone, Don't Wait on Removal
EAB-killed ash trees become structurally unpredictable within 2–3 years of death. The wood dries unevenly, becomes extremely brittle, and can drop major limbs without warning. A dead ash near a structure, driveway, or area where people spend time is a serious hazard.
The window for safe, cost-effective removal closes faster on ash than most species. A dead ash that costs $1,500 to remove today may cost considerably more — and require a crane — in two years when the wood has deteriorated further. If you have a dead ash, call us sooner rather than later: (573) 442-1838.
What Customers Say
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Frequently Asked Questions
- Emerald Ash Borer (EAB) is an invasive beetle from Asia that kills all native North American ash trees. It was confirmed in Missouri in 2008 and is now established statewide, including Boone and Callaway counties. Without treatment, infested ash trees die within 3–5 years.
- Key signs include D-shaped exit holes in the bark (about 1/8 inch wide), S-shaped larval galleries visible if you peel back loose bark, canopy dieback starting at the top and progressing downward, bark splitting or peeling, heavy woodpecker activity, and epicormic shoots (water sprouts) from the trunk or base. Trees can lose 30–50% of their canopy within two years of infestation.
- Yes, if caught early enough. Treatment is most effective when a tree still retains at least 50% of its canopy. Once infestation has advanced past that point, the tree's vascular system is too compromised to support recovery. We evaluate each tree and give you a straight answer on whether treatment makes sense — we won't recommend a $400 injection on a tree that won't make it.
- Trunk injection is the most effective method for trees with sufficient canopy remaining. The treatment is applied directly into the vascular system and protects the tree for two years. Soil drench applications are another option for certain sites. Our certified arborist evaluates each tree individually and recommends the appropriate method for its condition and stage of infestation.
- Treatment cost is based on tree size (trunk diameter at breast height) and the method used. We provide a free on-site estimate — there's no charge for the evaluation. We'll tell you the cost, the expected outcome, and whether we think treatment is worth it for your specific tree.
- Dead ash trees need to come down promptly. EAB-killed ash becomes extremely brittle and unpredictable within 2–3 years of death — large limbs can fail without warning. The longer a dead ash stands, the harder and more dangerous removal becomes. We handle ash tree removal, including crane-assisted removal when the tree is near structures.
- That depends on each tree's condition, location, and value to you. A healthy mature ash near your home is a strong candidate for treatment. A smaller or already-declining ash in an open yard may be better removed and replaced. We evaluate each tree individually and give you a recommendation based on real factors, not a blanket answer.
Request an EAB Evaluation
Tell us about your tree situation and we'll get back to you promptly.