Herbicide resistance continues to complicate weed control decisions for growers, particularly when it comes to waterhemp and other amaranth species. At the 2026 Farm Progress Show, UPL highlighted several herbicide options the company says can provide additional residual control and modes of action for growers managing those tough weeds.
UPL Technical Service Manager Adam Aberle said one of those products is Intrava DX, which combines the Group 5 active ingredients amicarbazone and metribuzin.
Aberle said amicarbazone works similarly to atrazine, but is not broken down by soil microbes in the same way. UPL developed Intrava DX with atrazine-resistant weeds, particularly waterhemp, in mind.
Residual control is especially important with waterhemp because emergence can continue throughout the growing season. Aberle said UPL has seen about five weeks of soil residual from Intrava DX across different soil types and geographies.
Aberle said the company has seen a 16 fluid ounce per acre rate provide strong control, although labeled use rates range from 11 to 27 fluid ounces per acre.
UPL is also pairing Intrava DX with Winger SC, a pyroxasulfone product. Aberle said the addition of Winger SC can improve grass control while Intrava DX provides broadleaf control, giving growers a wider spectrum of weeds to target.
Winger SC contains the same active ingredient found in Zidua SC. Aberle said the product is labeled for use in a number of row crops and provides another residual option for growers.
Winger SC is a Group 15 herbicide, something Aberle said is important when considering resistance management and the use of multiple modes of action.
UPL also highlighted Preview 2.1 at the Farm Progress Show. The soybean preemergence herbicide combines sulfentrazone and metribuzin in a co-crystal formulation.
Aberle said some growers already mix sulfentrazone and metribuzin themselves, but UPL designed Preview 2.1 to keep more of the active ingredients soluble despite changes in pH or environmental conditions. He said that can help maintain availability for root uptake throughout the season.
As growers evaluate weed control programs for another season, Aberle said UPL has trial data and technical information available through its local sales representatives and technical support managers. The company also works with university and Extension researchers on herbicide trials, with many of those results made publicly available.
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