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Background information available for download

Ash Tree Identification Guide produced by Michigan State University
A guide for identifying ash trees and learning how to distinguish them from similar looking trees. Download Here

Ash Tree Decline Poster provided by Tree Guru
A visual guide for determining the extent of Emerald Ash Borer infestation in an ash tree and deciding which trees can be treated and saved. Download Here

Insecticide Options for Protecting Ash Trees from Emerald Ash Borer provided by The Cooperative Emerald Ash Borer Program
A comprehensive guide to treatment options and the various products available to homeowners and tree service professionals. Download Here

Confirmed EAB Infestations in Illinois from the Illinois Department of Natural Resources
Updated as of April 3, 2013, this is a comprehensive chart of all known EAB infestations in Illinois communities and the first date of confirmation. The dates are important to determine the extent of infestation in your community. Based on the ten-year death cycle of the EAB, communities that have been infested for five years or more will experience a massive expansion of EAB damage this year. Download Here


The following graphic shows the spread of the EAB infestation into the southern counties of Illinois by the summer of 2015. On October 21st of that year, Illinois conceded defeat and removed the state EAB quarantine. Download a pdf version of the Original Article Here.

The map below shows the Federal EAB Quarantine Area in the US as of June 19, 2015.


Chicago area tree service companies


The following are a list of state-licensed tree service companies in the Chicago area. They all offer the TreeAge trunk-injection treatment. Several of them offer a group discount if multiple trees can be assessed and treated at the same time. Homeowners, block clubs and other local community organizations are encouraged to band together to form treatment blocks in order to negotiate the best prices.

Treatment prices are based on several criteria such as tree size, condition and ease of access. Prices will typically be quoted based on the "DBH" of the tree to be treated. DBH is defined as "Diameter at Breast Height". It refers to the diameter of the ash tree measured at a point 4.5 feet above the ground. To determine the DBH of a tree, take a tape measure and record the circumference of the tree at a point 4' 6" above the ground. Divide the circumference by the number pi (symbol: π) or 3.14159. If you don't have a calculator handy, dividing the circumference of the tree by 3 will provide a close estimate. For group pricing, we have received estimates in the range of $7 - $10 dollars per inch of tree diameter (DBH). Several companies will offer a guarantee but only if the tree is healthy or barely infested. Contact the tree service companies directly for more details.
  • Kinnucan Tree Experts & Landscape Company (Chicago and northern suburbs)
    Serving the North Shore for Over 40 Years
    Kris Bockhaut - principal contact
    28877 Nagel Court
    Lake Bluff, IL 60044
    847-234-5327
    847-234-3260 (fax)
    Email: kris@www.kinnucan.com
    Web site: www.kinnucan.com
  • The Care of Trees, a Davey company (greater Chicagoland)
    Clayton Ruyle - Arborist
    340 N. Hoyne Ave
    Chicago, IL 60612
    312-492-7206
    Email: Clayton.Ruyle@davey.com
    Web site: www.thecareoftrees.com
  • Crosstown Tree Service LLC (Chicago and northern suburbs)
    Ken White - Arborist
    410 Florence Ave
    Evanston, IL 60202
    773-784-9887
    Email: Kevin@crosstowntreeservice.com
    Web site: www.crosstowntreeservice.com