Stop the Spread: What You Need to Know About the Emerald Ash Borer
The Emerald Ash Borer (EAB) is more than just a pesky beetle—it's one of the most destructive invasive tree pests in North America. Since its arrival from Asia in 2002, this metallic green insect has caused the death of tens of millions of ash trees across 37 states and the District of Columbia—and it's still spreading.
At Wild Man’s Tree Service, we’re keeping a close eye on this threat and want to help you protect your trees and property.
What Is the Emerald Ash Borer?
The EAB is a small, bright green beetle with a copper-red underbelly. Though adults only live for about three weeks, their impact lasts much longer. The real damage is done during the larval stage—when the beetles tunnel beneath the bark of ash trees and feed on the inner layers, cutting off the tree’s ability to transport water and nutrients.
The image above shows the relative size of the EAB on a U.S penny.
⚠️ Signs of an Infestation
It can be difficult to detect EAB early, but here are some red flags to watch for:
D-shaped exit holes in the bark from emerging adults
S-shaped tunnels beneath the bark created by larvae
Dead branches near the top of the tree
Vertical bark splits and excessive sprouting along the trunk
Increased woodpecker activity, as they search for larvae beneath the bark
🛑 Prevention Tips
The number one way people unintentionally spread the Emerald Ash Borer? Moving firewood.
To help stop the spread:
Only buy local or certified heat-treated firewood
Never move firewood across state or county lines
Visit DontMoveFirewood.org to learn more
The image above shows some of the destruction a EAB can cause.
🌱 Treatment Options
Early treatment can help save an ash tree if it hasn’t been heavily infested. Insecticidal treatments are available at most garden centers and hardware stores. For best results, we recommend contacting your local Cooperative Extension office or calling a certified arborist.
At Wild Man’s Tree Service, we can inspect your trees, identify early signs of Emerald Ash Borer activity, and recommend the best plan of action.
Let’s protect Colorado’s trees—together. If you suspect EAB damage on your property, contact us today for a professional inspection.