General Information
Why is EAB important?
What does EAB Look Like?
What does an Ash Tree Look Like?
How Do I Know If My Trees Have EAB?
Where has EAB been found?
Firewood Regulations
State and Federal Quarantines
Quick Link for Industry
Management Options, Tips and Tools
For Homeowners
For Woodlot owners
For Communities
For Professionals
What Is Wisconsin Doing About EAB?
Wisconsin's Response Plan
Survey Program
Upcoming Events


EAB and Ash Trees
How big is EAB?
An adult EAB is a beetle approximately 3/8 to 1/2 of an inch long and approximately 1/16 of an inch wide. EAB larvae (immature stage of EAB) vary in length as they grow. Full grown larvae average approximately 1.5 inches in length.

Does EAB attack other trees besides ash?
EAB strictly attacks ash trees (Fraxinus species) of all sizes, whether healthy or unhealthy. Other trees with ash in their name such as mountain ash or prickly ash are not true ash trees and are not threatened by EAB.

Why is Mountain Ash not threatened by EAB?
Mountain ash is not true ash or a Fraxinus species. Mountain ash is actually part of the Rose family.

Where is EAB in Wisconsin?
Emerald ash borer has been confirmed in Adams, Brown, Buffalo, Calumet, Columbia, Crawford, Dane, Dodge, Door, Douglas, Fond du Lac, Grant, Green, Jackson, Jefferson, Kenosha, La Crosse, Lafayette, Marquette, Milwaukee, Monroe, Oneida, Outagamie, Ozaukee, Portage, Racine, Richland, Rock, Sauk, Sawyer, Sheboygan, Trempealeau, Vernon, Walworth, Washington, Waukesha, Winnebago and Wood counties.

Where can I send in an EAB sample for identification?
If you find what you think is an EAB beetle or larva, you can send your sample to the Emerald Ash Borer Program, WI DATCP, P.O. Box 8911, Madison, WI 53708-8911. Place your sample in a small sturdy container so it will not get damaged through the mailing process. Please include your name, address, phone number, and where and when you found the beetle/larva. As soon as we identify your sample, we will contact you.

What happens if my tree is infested with EAB?
Depending on the extent of the infestation and the health of the tree, you may be able to chemically treat the tree to prevent additional damage. An arborist or other tree care professional can help you make that decision. Local ordinances may require that you remove the tree and you should check with your municipality. State agencies working on EAB issues do not mandate that an infested tree on private property be removed.

EAB Management & Treatment
Is there a pesticide that kills EAB?
Currently, there is no pesticide that is 100 percent effective in killing EAB. There are products that help protect ash trees from the pest. UW-Extension has published a guide to insecticides for homeowners. You may also consult a professional arborist for treatments that must be applied by a licensed pesticide applicator.

Am I responsible for taking my tree down if it is infested with EAB?
The state does not mandate removal of EAB infested ash trees, however municipalities may require removal under local ordinances. Even if not required by ordinance, the removal of EAB infested trees is recommended. EAB infestation causes tree mortality and dead trees pose a safety risk to private and public property. Removal of the trees and proper disposal may help slow the spread of EAB in the immediate area.

What should I do if I suspect a tree on somebody else's property is infested with EAB?
If possible, talk to your neighbor about your concerns and observations. Ask them to call the Wisconsin EAB Hotline and report the tree to us as an inspection might be necessary. The number is 1-800-462-2803.

If the tree belongs to the municipality you live in, please contact your municipality's public works department.

How do I get a trap to catch EAB on my property?
EAB traps are not distributed to the public. We do not use the traps as a method of control, but as a survey and detection tool.

Can EAB program staff come and look at my tree?
EAB program staff will only inspect trees suspected of EAB infestation. Because there are many other reasons for ash trees to appear unhealthy, staff will guide the property owner through a series of questions to determine whether the tree may be infested or not.

Hiring a private arborist or other tree care professional is often very helpful. They can help you determine if your tree is suffering from EAB infestation or some other problem. In either case, they will work with you to develop a course of action.

EAB Quarantine & Regulations
What counties are quarantined for EAB?
Adams, Brown, Buffalo, Calumet, Columbia, Crawford, Dane, Dodge, Door, Douglas, Fond du Lac, Grant, Green, Iowa, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Manitowoc, Marquette, Milwaukee, Monroe, Oneida, Outagamie, Ozaukee, Racine, Richland, Rock, Sauk, Sheboygan, Trempealeau, Vernon, Walworth, Washington, Waukesha and Winnebago counties are under quarantine. Jefferson and Sheboygan counties are under quarantine because of their proximity to infestations in neighboring counties. We have not confirmed the presence of EAB in either of those two counties, however.

What does it mean when an area is quarantined?
When an area is quarantined, it means that residents and affected businesses must not transport any hardwood firewood, ash nursery stock, ash logs or timber out of the quarantined area. This restriction helps prevent the pest's introduction to new areas and to minimize its spread.

Can I move firewood into or out of a quarantined area?
Firewood cannot be transported out of a quarantined area. It can, however, be transported into or within a quarantined area without penalty.

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