Palmer Amaranth in the West Symposium Scheduled in March

Farmer stands in sugarbeet field
A farmer walks a weedy sugarbeet field at a weed tour in June at the UNL Panhandle Research Extension and Education Center in Scottsbluff. (Photo by Chabella Guzman)

Palmer Amaranth in the West Symposium Scheduled in March

The Western Society of Weed Science will host a free symposium on Palmer amaranth on Thursday, March 7, at the Grand Hyatt in Denver, Colorado. The symposium will be held during the society’s annual meeting.

Parts of Colorado and Western Nebraska have struggled with herbicide-resistant Palmer amaranth for several years, with significant impacts on minor and specialty crop industries. In 2023, Palmer amaranth was identified for the first time in the Intermountain West and Pacific Northwest. The symposium will bring together academics, industry leaders, and impacted stakeholders to discuss Palmer's current and anticipated impacts across the region.

The symposium is free to the public as a service of the WSWS. It will also be streamed live.

Register for the Palmer amaranth symposium online. For those wishing to attend other functions offered by the WSWS during their annual meeting March 4-7, visit the WSWS meeting page.

The symposium agenda is as follows:

  • 9:30 a.m. — Origin stories: Hypotheses for the Rise of Palmer Amaranth, Kelsey Brock, University of Wyoming assistant professor
  • 10 a.m. — Impacts of Palmer Amaranth to the Dry Bean Industry, Jerry Haynes, Jack’s Bean Company agronomist
  • 10:20 a.m. — Impacts of Palmer Amaranth to the Sugarbeet Industry, Rebecca Larson, vice president, chief scientist, and governmental affairs for Western Sugar Cooperative
  • 10:40 a.m. — Impacts of Palmer Amaranth to the Seed Industry, Laura Pottorff, Colorado State University director of seed programs
  • 11 a.m. — State of Palmer Amaranth Resistance in the West, Todd Gaines, Colorado State University associate professor
  • 11:30 a.m. — Management of Palmer Amaranth in the West, Nevin Lawrence, University of Nebraska associate professor

The symposium has been organized by Nevin Lawrence, University of Nebraska, Albert Adjesiwor, University of Idaho, and Andrew Kniss, University of Wyoming.


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