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"Large ash trees provide so many benefits--so it's important to try to save them instead of remove them," Greg Wilson, district manager of Davey's West St. Louis residential tree care services.

How to Spot and Prevent Emerald Ash Borer

June 4, 2015

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 arborist for a free consultation.

Infographic source: Wisconsin Emerald Ash Borer Program

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