Emerald Ash Borer in Missouri: What You Need to Know

Serving: Columbia, MO, Jefferson City, MO & Columbia, MO

May 8, 2025

What Is the Emerald Ash Borer?

The Emerald Ash Borer (EAB) is an invasive beetle originally from Asia that has caused devastation to ash trees across the U.S. since its discovery in Michigan in 2002. It arrived in Missouri shortly after and has spread rapidly across the state, killing tens of thousands of native ash trees.

Why It’s a Serious Threat

EAB larvae tunnel beneath the bark of ash trees, disrupting their ability to transport water and nutrients. Infested trees typically die within 2 to 4 years if untreated. Once an infestation begins, it spreads quickly and is almost always fatal without intervention.


Key signs of EAB infestation include:


  • Thinning leaves or dying branches in the upper canopy

  • Splitting bark or S-shaped larval tunnels

  • Increased woodpecker activity

  • D-shaped exit holes in the bark

Where in Missouri Is It Found?

The EAB has been confirmed in dozens of counties throughout Missouri, including areas near Columbia and Fulton. Many municipalities now restrict the planting of new ash trees and encourage removal or treatment of at-risk trees.

Can Infected Trees Be Saved?

In some cases, yes. If caught early, trees can be treated with systemic insecticides that target EAB larvae. These treatments typically need to be applied every one to two years and work best on otherwise healthy trees.


However, if more than 30% of the tree’s canopy is already dead, removal is often the safest and most cost-effective option.

What Should You Do?

If you have ash trees on your property:


  1. Inspect regularly for signs of infestation
  2. Avoid pruning during peak beetle activity (spring through early summer)
  3. Call Advanced Tree Solutions for a tree health assessment


We’ll determine whether your ash tree can be saved—or if it’s time for safe, professional removal.

Need Help with an Ash Tree?

Our team serves Columbia, Fulton, and surrounding areas with expert diagnosis, treatment, and removal of infected trees. We’re licensed, insured, and ready to help you protect your property and stop the spread.


Schedule a Tree Health Assessment.

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