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
Insecticide Options for Protecting Ash Trees from Emerald Ash Borer provided by The Cooperative Emerald Ash Borer Program
Confirmed EAB Infestations in Illinois from the Illinois Department of Natural Resources
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.
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.