How to Spot and Prevent Emerald Ash Borer

How to Spot and Prevent Emerald Ash Borer

The sun is shining and trees are leafing out! Davey is on the air to talk trees and disease this spring season.

Davey is proud to appear on St. Louis’ KTRS, NewsRadio 550 station this spring, summer and fall. Each Saturday afternoon, one of our local district managers will discuss several tree and landscape topics—some of which we will feature on the Davey blog!

Davey Tree Arborist on the Air: Last week, Greg Wilson, district manager of Davey’s West St. Louis residential tree care services, discussed how to spot and prevent emerald ash borer (EAB) with radio hosts Jim McMillan and John Shea of the “Inside Out” show. The following script is based on Wilson’s interview.

KTRS: We have our little friend the emerald ash borer popping its head out this time of year, am I right?

GW: Yes, that is correct—EAB begins as larvae, which is the destructive period and then forms into an adult within two-to-three weeks during May and June, when it emerges from the bark in D-shaped exit holes. You can start looking for EAB signs now if you have ash trees. Look for crown die-back or sucker growth at the base. If you find infection, give us a call and we will have an arborist come out and inspect your trees.


KTRS: How much does it cost?

GW: The cost depends on the diameter of the tree—giving us the exact measurement of chemical we need to put in your ash tree in order to save it. We do offer a free consultation to inspect your trees and give you treatment options from there. 

KTRS: How does EAB create tree damage? What is the process?

GW: EAB’s larvae stage is what causes the damage. The larvae are transmitted underneath the bark, creating galleries, which shifts the flow of nutrients in the tree. As the larvae galleries continue to grow it cuts out circulation in the cambium, which stops the flow of food to the top of the tree. This is when you notice damage and dieback in the crown.

KTRS: So, developed EABs lay eggs in the bark of the tree, then the young EABs bore into the tree?

GW: That’s correct, and then the EAB starts to emerge and the life cycle continues. If you are worried your most beloved ash tree is infected, I would suggest calling an arborist to come out and inspect the tree and give it the proper preventive treatment it needs to survive. Large ash trees provide so many benefits—so it’s important to try to save them instead of remove them.

For more advice about EAB treatment options, listen to the full interview with Dreyer.

Need EAB treatment or advice? Contact your local Davey professionally trained arborist for a free consultation.

Infographic source: Wisconsin Emerald Ash Borer Program

Add a comment:
Featured or Related Blog Posts
  • Davey Institute Hosts Tree Biomechanics Research Week Symposium

    Tree limbs drop from bucket truck lifts and cranes as researchers make observations, form calculations and answer questions below.

    While an individual depletes the foliage of a fallen branch by removing its leaves one-by-one, another researcher trims all limbs from the trunk of a tree to test its durability and strength without them.

    The branch of a tree receives a coat of paint before camera software begins analyzing the compression in the bark upon branch movement. 

    Read More
  • The 101 on Emerald Ash Borer

    Emerald ash borer (EAB) is one small pest that has caused a lot of damage. EAB was once thought to be a death sentence for your ash trees. Now, we know it’s not.

    Read on to learn the newest, latest information about this damaging pest and raise awareness about emerald ash borer.

    Read More
  • Does Emerald Ash Borer Treatment Work?

    Flashback to 2002. A tiny, exotic beetle, identified as emerald ash borer, was just discovered in Michigan.

    By 2009, EAB killed an estimated 58 million ash trees in thirteen states, according to Dr. Leah Bauer of the USDA.

    EAB was once thought to be a death sentence for your trees. Now, we know it’s not. You can treat EAB and save your ash trees.

    Below, we’re answering your most common questions about EAB treatment – with help from our resident EAB expert, Anand Persad of the Davey Institute.

    Read More
  • Detroit Davey Employees Preserve a Treasured, EAB-Infested Ash Tree

    We all have one tree in our yard – or from our childhood home – that holds the most special place in our heart. The one you planted right when you moved in or the big, stately oak your children used to climb. The one tree you can’t help but smile when you see.

    For Cathy P. in Detroit, it was the tree her late father-in-law had helped her husband plant 20 years ago. But it was time to say goodbye to the tree last fall when emerald ash borer damage threatened its survival. Read below how Davey was able to help keep the memory of her tree alive – even after its demise.

    Read More
  • Protect Your Ash Trees: Spot the Early Signs of EAB

    As tiny as the emerald ash borer (EAB) is, boy, it wreaks havoc.

    This 0.5” beetle has killed millions of ash trees since arriving on the scene in 2002.

    Back then, if too many EAB larvae burrowed in your ash tree, it was likely a goner.

    Read More

Request a consultation

What do you need services for?
Sorry, we can’t seem to find the zip code you specified. Our residential tree care offices may not service your area. If you believe this is an error, please try again. Need help? Email us at
  • Email newsletter
  • Woodchips
*Please fill out all required fields.