Emerald Ash Borer found in Whitewater - WQOW TV: Eau Claire, WI NEWS18 News, Weather, and Sports

Emerald Ash Borer found in Whitewater, Jefferson County under quarantine


WHITEWATER (WKOW) -- Jefferson County is under a quarantine for Emerald Ash Borer after a tree was found with it just across it's Walworth County border and signs of it inside the county itself.

In June, insects were found in a tree removed on the UW-Whitewater campus inside the Walworth County lines.

On July 1, a DATCP specialist helped remove a tree on the Jefferson County side of campus.

They did not find insects in that tree, but did find tunneling which is evidence of Emerald Ash Borer.

Jefferson County now joins Walworth County in the quarantine.

The quarantine means wood products are prohibited from being moved out of the county to areas not infested.

If you suspect Emerald Ash Borer:

  • Keep a close watch on ash trees for signs of possible EAB infestation:  Thinning in the canopy, D-shaped holes in the bark, new branches sprouting low on the trunk, cracked bark, and woodpeckers pulling at the bark to get to insect larvae beneath it.
  • If your property is within 15 miles of a known infestation, consider preventive treatments. Whether to treat depends on several factors: the age of the trees, the size of the trees, and the number of trees. Treatment costs vary depending on size of the tree and whether you do the treatments yourself or hire a professional.
  • Consider planting different species of trees that are not susceptible to EAB.
  • Contact a professional arborist for expert advice, and visit emeraldashborer.wi.gov for detailed information.


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