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Emerald Ash Borer (EAB)

A new EAB Restricted Zone went into effect May 2017.

Emerald Ash Borer
Emerald Ash Borer. Photograph:
David Cappaert.

Please note: If you have ash trees, stop and learn more before you act. The potential threat of emerald ash borer (EAB) is real; however, acting without understanding the specific threat to your trees, regulations and quarantines, and your options, could cause the unnecessary loss of treasured shade trees, or loss of substantial income from your woodlot. For more information, please see the links in the right hand column of this page.

The emerald ash borer is smaller than a penny.
The emerald ash borer is smaller than
a penny. Photo: Howard Russell,
MI State U.,

The emerald ash borer (Agrilus planipennis) was first discovered in the U.S. in 2002 in southeastern Michigan. It was also found in Windsor, Ontario the same year. This Asian beetle infests and kills North American ash species (Fraxinus sp.) including green, white, black and blue ash. Thus, all native ash trees are susceptible. Adult beetles leave distinctive D-shaped exit holes in the outer bark of the branches and the trunk. Adults are roughly 3/8 to 5/8 inch long with metallic green wing covers and a coppery red or purple abdomen. They may be present from late May through early September but are most common in June and July. Signs of infection include tree canopy dieback, yellowing, and browning of leaves.

EAB larva
EAB larvae can reach 2 3/4 inches long.
Photo: David Cappaert

Most trees die within 2 to 4 years of becoming infested. The emerald ash borer is responsible for the destruction of hundreds of millions of ash trees in the U.S. since its discovery in Michigan.

After reviewing the identification material on this website, if you think you have EAB, call the Department's EAB and Firewood hotline at 1-866-640-0652.

Watch a clip about Emerald Ash Borer and check out other clips on DEC's YouTube Channel.


Links for User Groups

Links to general information about the emerald ash borer:

The rest of these links lead off the DEC website. By clicking on them, you will leave the DEC website.

More about Emerald Ash Borer (EAB):