Emerald Ash Borer 


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It has been confirmed by the Wisconsin Department of Trade and Consumer Protection and the Wisconsin DNR, of the Emerald Ash Borer (EAB) presence in Wisconsin.  The EAB is an invasive insect pest of ash trees and is responsible for the destruction of over 25 million ash trees in twelve regional states and a province in Canada.  In Wisconsin the first discovery was made in a private woodlot in Ozaukee County near the village of Newburg in August 2008, but its presence has also now been confirmed in several other counties.  In response, Wisconsin officials have quarantined eleven counties (Brown, Crawford, Fond du Lac, Kenosha, Milwaukee, Racine, Ozaukee, Sheboygan, Vernon, Washington, Waukesha) restricting the movement of hardwood and ash nursery stock out of infested area.

The Oneida Health & Safety Division (EH&S) has taken steps to help detect the EAB by partnering with the USDA/APHIS (Animal & Plant Health Inspection Service) to install monitoring traps at several locations within the reservation.  EH&S has been monitoring for their presence since 2006.  Staff will continue with the monitoring program and report any EAB finding to APHIS for confirmation.

Tribal residents and visitors are encouraged to use local sources of firewood, here or at any travel destination, to help control the spread of the EAB. 

From May to August, metallic green adults only a half inch long lay eggs on ash bark that hatch into larvae and tunnel into the tree.   August to October, the larvae feed under bark, creating “S” shaped galleries.  EAB larvae over winter under bark emerging in May to June as adults leaving “D” shaped exit holes.  After summer mating the cycle starts again.

For more information or to report any suspected presence of EAB contact the Oneida Conservation Office Forester at 869-1450, and/or visit the following resources:

                        WI DNR – http://www.dnr.state.wi.us/forestry/fh/ash/

                        Wisconsin EAB Resource – www.emeraldashborer.wi.gov