The Walworth County Department of Public Works will conduct roadside vegetation management activities in late April and early May to control invasive plant species and reduce long-term mowing costs.

Beginning the latter part of April, weather permitting, residents may observe Public Works crews applying herbicide treatments along County Highway rights‑of‑way. Crews will also conduct selective spraying within the rights‑of‑way of designated State highways, including State Highways 50, 11, and 89.  These activities support the County’s ongoing Vegetation Management Plan, which is designed to improve roadside ecosystem health while lowering expenditures for mowing labor, equipment maintenance, and fuel.

Invasive plant species such as wild parsnip, ragweed, field sow thistle, and chicory remain a significant concern in southeastern Wisconsin and are present throughout Walworth County. These plants can pose safety risks to highway workers, hinder visibility, and displace native vegetation. Vegetation management efforts over the past few years have substantially reduced invasive growth, resulting in more efficient and safer mowing operations.

For the 2026 season, County staff—trained and certified in herbicide application—will use an EPA‑approved blend of broadleaf herbicides and plant growth regulators formulated to target invasive species while minimizing impacts on native plants, including grasses and milkweed. This approach supports pollinators, enhances wildlife habitat, and helps restore ecological balance along roadways.

Residents, including organic growers, who have questions or concerns about the vegetation management program are encouraged to contact the Walworth County Public Works Highway Division at (262) 741‑3114. Find more information at www.co.walworth.wi.us/1278/Vegetation-Management.

Editor’s note: This press release was provided by the Walworth County Highway Department. Our apologies that it was not posted earlier.