EAB found in four more towns in Walworth County
The emerald ash borer has been confirmed in four more municipalities in Walworth County, according to the Wisconsin Department of Agriculture, Trade and Consumer Protection.
The insect was found in the towns of Darien, Geneva, Richmond and Sharon.
Additionally, it was confirmed in the villages of Paddock Lake and Silver Lake in Kenosha County, the city of Muskego in Waukesha County, and the town of Holland and the village of Random Lake in Sheboygan County.
Although Sheboygan County was quarantined previously because of nearby infestations in neighboring counties, these are the first confirmations of EAB in the county.
DATCP recommends that property owners who have ash trees in quarantine counties:
Keep a close watch for possible signs of EAB infestation: Thinning canopy, D-shaped holes in the bark, cracked bark, branches sprouting low on the trunk, and woodpeckers pulling at bark.
• Consider preventive treatments if your property is within 15 miles of a known infestation.
• Consider planting different species of trees that are not susceptible to EAB.
• Call a professional arborist, and visit emeraldashborer.wi.gov for detailed information.
Emerald ash borer is native to China and probably entered the United States on packing material, showing up first in Michigan about 10 years ago. It was first found in Wisconsin in 2008 in Washington County. Other quarantined Wisconsin counties are Brown, Crawford, Dane, Dodge, Door, Douglas, Fond du Lac, Jefferson, La Crosse, Milwaukee, Ozaukee, Racine, Rock, Sauk, Trempealeau, Vernon, Washington and Winnebago.
EAB adults lay eggs on the bark of ash trees in mid- to late summer. When the eggs hatch a week or two later, the larvae burrow under the bark for the winter and feed, forming the characteristic S-shaped tunnels and destroying the tree's ability to take up nutrients and water. In summer, the adults emerge through D-shaped holes in the bark.