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Treatment Options

As the Emerald Ash Borer spreads across the midwest, every ash tree in its path must be treated or removed. Even trees that are already showing signs of infestation can be treated and saved if the damage to the tree's canopy is less than 40-50%.

There are several treatment options for Emerald Ash Borer that include spraying, soil drenching and trunk injection. Trunk injection is the most effective method. University research indicates that trunk injection is up to 99% effective. And, other treatment options have to be repeated each year while trunk injection is an every two or three year treatment regimen.

Trunk Injection
TREE-age is a safe pesticide approved for the treatment of Emerald Ash Borer. Unlike other pesticides, TREE-age is injected directly into the trunk of the tree, much like an IV a person might receive in a hospital. Injection allows the pesticide to move throughout the tree, protecting it from attack and killing-off EAB larva that may already be growing under the bark. Injecting directly into the trunk also keeps pesticide where it needs to be without exposing children, pets and the local water supply to unnecessary risk.

Drenches and Sprays
There are a variety of pesticides approved for the protection of ash trees against borers. Some pesticides are applied by spraying the tree trunk or drenching the ground around a tree, allowing its roots to take-up the pesticide. Although both of these options show some effectiveness against EAB, they also risk exposing pets and children to pesticide. To protect the water supply, there are also EPA limits on the amount of pesticide that can be applied as a drench in a neighborhood.

Do nothing
Ash trees that are neglected will eventually become infected by the borer. As the untreated tree provides the beetle with a safe home to reproduce and spread, it will also become more and more ill. EAB larva chew through the tree's phloem (its veins) and within two to three years, the tree will die. Dead trees pose a danger to life and property and must be removed. Removal is a costly option, general upwards of $1000 per tree.
Insecticides Available to Combat the Emerald Ash Borer


The above chart, courtesy of The Cooperative Emerald Ash Borer Program, lists the various products available to combat the Emerald Ash Borer. For more information regarding treatment options and and the various products available to homeowners and tree service professionals download their publication:
Insecticide Options for Protecting Ash Trees from Emerald Ash Borer.

See our Resources page for a list of tree service companies in the Chicago area.