Potential herbicide resistance, weather and seed longevity complicate control efforts for Iowa farmers.

Iowa farmers continue their battle in 2025 against the state’s most invasive weed targeting corn and soybean crops.

Waterhemp continues to successfully maneuver around control efforts amid shifting weather and increasing herbicide resistance, proving to be a season-long nemesis for farmers.

Wes Everman, weed science specialist with Iowa State University Extension and Outreach, said this year’s weather...