Corteva Agriscience, Agriculture Division of DowDuPont, submitted a new herbicide for broadleaf weed control on pastures and rangeland to the U.S. Environmental Protection Agency (EPA).
Corteva says pending EPA registration, this herbicide will provide cattle producers access to a broader-spectrum weed control product compared with current market standards. This will be first new active ingredient for pastures and rangeland in more than 10 years.
The company anticipates announcing the brand name for this new pasture herbicide in 2019.
Corteva says multiple years of testing show improved control of important broadleaf species, including wild carrot, giant hogweed, wild parsnip, poison hemlock and common caraway, plus better late-season control of marshelder and ironweed. It brings Rinskor active, recipient of the 2018 Presidential Green Chemistry Challenge Award, to pasture management.
Corteva says the new forage has a number of anticipated features:
- Safe to desirable forage grasses.
- Season-long residual control.
- Low use rate.
- Compatibility with dry and liquid fertilizer.
- A low-odor formulation.
"Tall ironweed is the number one weed problem in beef cattle pastures in our area," says William W. Witt, emeritus professor, Plant and Soil Sciences at the University of Kentucky. "It reduces forage production, and cattle avoid grazing around it. So, it reduces available grazing area."
Witt conducted multiple trials over several years with this new pasture herbicide and says tall ironweed control exceeded 90% one year after treatment. He says the potential for better late-season control would benefit producers.
"Tall ironweed is a deep-rooted perennial, so we need a highly effective herbicide," Witt said. "When weather or the busyness of the spring prevent early pasture spraying, a wider treatment window would be helpful."
Pending EPA registration, Corteva Agriscience expects this to be the second of three products brought to the pasture market over the next three years.
"Earlier this fall, we introduced MezaVue herbicide as the new standard in pricklypear control," Palmer said. "Corteva Agriscience is focused on working with cattle producers to help them meet their individual goals for their land -- that is a significant objective for us. In addition to our legacy brands, including GrazonNext HL, Chaparral and PastureGard HL herbicides, we are committed to researching and developing new, simple solutions for ranchers across the country. We are excited about bringing these new products to market."
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