Emerald Ash Borer
Report EAB

Please report all suspect emerald ash borer findings by calling the toll free emerald ash borer hotline at 1-800-462-2803. In order to best inform our emerald ash borer responders please include the following information if possible when calling.

• Do you have an ash tree? (Mountain ash (Sorbus spp.) is not a known host of emerald ash borer.) Do you need help determining if your tree is an ash? [PDF, 627KB]
• What symptoms are you seeing?
• Dying ash with sprouts along the stem or at the base of the tree?
• D-shaped exit holes in the bark?
• Winding, S-shaped tunnels under the bark?
• Bullet-shaped, iridescent green beetles present from June-August?
• Woodpecker activity on the tree?
• Dieback of the upper crown?
• If you saw a metallic green beetle, where was it (on the ground, flying, in a tree)? Were you able to collect it?
• Are you familiar with the commonly encountered emerald ash borer look-a-likes? [exit DNR]. More information on native borers and emerald ash borer look-alikes is contained in this MSU Extension Bulletin [PDF, 1MB].
• Is it possible to take digital photos of the emerald ash borer-like symptoms you see and send them to us?

Reporting and Submitting Emerald Ash Borer Suspects and Samples [PDF, 13KB]

For additional information on emerald ash borer, please refer to: The State of Wisconsin Emerald Ash Borer Resource [exit DNR] or the national Emerald Ash Borer official website [exit DNR]