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Corteva Agriscience Submits New Pasture Herbicide to EPA

Pasture herbicide promises new active ingredient, pending registration

There’s a new pasture herbicide in the works. Corteva Agriscience has submitted a new herbicide for broadleaf weed control on pastures and rangeland to the EPA. Pending EPA registration, Corteva Agriscience officials say this herbicide will give 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, say Corteva Agriscience officials. 

“Regardless of market conditions, it’s always a good idea in the cattle business to focus on the forage production and quality side of the equation,” said Damon Palmer, pasture and land management leader at Corteva Agriscience in a company news release. “Effective weed control can help producers get greater productivity from their lowest-cost feed source — grazing land — and maximize their return on their investment.”

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, say Corteva Agriscience officials. Benefits include: 

  • 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,” explains 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. 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 says. “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 prickly pear 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.”

Corteva Agriscience anticipates announcing the brand name for this pasture herbicide in 2019. 

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