Wisconsin officials say emerald ash borer has been discovered in two locations in Walworth County, including downtown Lake Geneva.
That brings to 10 the number of Wisconsin counties where the invasive, destructive pest has been confirmed.
The Department of Agriculture, Trade and Consumer Protection says evidence of the pest has been discovered in a private woodlot along the Wisconsin-Illinois border. Last Thursday, an ash tree about a half-mile south of the Illinois line showed signs of the tree-killing disease.
On Monday, a city forester in Lake Geneva, working with the DNR, submitted a photo of an ash tree displaying signs of infestation. State officials confirmed the Lake Geneva ash also had the disease.
The Milwaukee Journal Sentinel reports Walworth County will soon be placed in quarantine.