Confirmation of Emerald Ash Borer in La Crosse County

Details of Latest Confirmation: Six beetles were discovered on a survey trap in west central La Crosse County, about a mile east of the La Crosse city limit in the Town of Medary. The adult insects were discovered by a DATCP EAB trapper during routine trap inspection and end-of-season trap removal. The specimens were sent to federal identifiers and subsequently confirmed as EAB on Friday, August 19, 2011.

Where Else Has EAB Been Found in Wisconsin: The tree-killing emerald ash borer has been discovered so far in nine Wisconsin counties, including the recent addition of La Crosse County.  The other counties are Brown, Crawford, Kenosha, Milwaukee, Ozaukee, Racine, Vernon, and Washington.

Quarantined Counties: La Crosse County will be quarantined soon. Neighboring counties may be added to the quarantine pending further review. EAB quarantines currently exist in Brown, Crawford, Fond du Lac, Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Vernon, Washington and Waukesha counties.

Resources: Background information regarding EAB can be found on the web at  Area residents with concerns of infested ash trees should contact a certified arborist or other tree care professional to assist them.

Emerald Ash Borer Publications

Homeowner Guide to EAB Insecticide Treatments (.pdf, 2 pages)

Professional Guide to Emerald Ash Borer Insecticide Treatments (.pdf, 2 pages)
Emerald Ash Borer: Insecticide Options for Protecting Ash Trees and Their Effectiveness (.pdf, 9 pages) Alternatives to Ash for Homeowners(.pdf, 2 pages)