Expanding Options and Ease of Use with HighNoon® Herbicide

When you’re helping customers manage vegetation across the U.S., you develop a talent for finding the right balance. Steve Gray, Territory Manager for Nutrien Solutions, knows his customers are constantly juggling factors like time, labor, product efficacy, and landscape needs. Gray likes bringing his customers solutions that help them worry less about dropping any balls.

For Gray, HighNoon^® herbicide from Corteva Agriscience has been just that kind of product, giving his customers an option that balances efficacy, efficiency, and ease of handling while fitting right in with existing management programs.

Efficacy and ease of use

HighNoon combines aminopyralid with Rinskor^® active, an award-winning active ingredient, to provide selective activity that helps maintain desirable grasses and forbs while controlling more than 140 broadleaf weeds. On top of that, it provides suppression of certain woody species like box elder. Previously approved for use in the western U.S., HighNoon recently gained approval in an expanded number of states. That’s good news for Gray, whose wide-ranging territory features diverse temperatures, climates, and topographical features. 

Gray was already familiar with Rinskor, which has received a lot of industry recognition for its sustainable profile — including low use rates and low persistence in the environment. “We like the activity we’ve seen from the Rinskor on a wide range of broadleaf weeds, especially the carrot family, poison hemlock, and others,” he said. 

For Gray, however, efficacy is only part of the story. The ability of HighNoon to fit seamlessly into a workflow is almost as important as how it performs against undesirable weed species.

“Blendability” of HighNoon saves time during batching

A large portion of Gray’s business involves custom blending. “We’re always looking for products that blend better. In speaking with my counterparts out West where HighNoon has been in use for some time, I learned HighNoon stays in suspension very well,” he said. “Being familiar with the efficacy of [Rinksor], and knowing HighNoon would potentially blend better, we decided to give it a try.”

Gray estimates that over the course of a workday, using HighNoon, which is a liquid, instead of a product that requires a slurry, could save crews 30 to 45 minutes.

“Think about it,” he said. “If you’re using a 1,000-gallon tank, you’re probably refilling that tank at least twice, maybe three or four times a day. And if you’re preparing a slurry and mixing it in, then rinsing the container you used, that’s 10 or 15 minutes per tank. Eliminate those steps, and you’ve saved some real time.”

Another benefit? Less chance for an error in mixing. “Any step we can take out of the process reduces the potential for an incorrect batching,” Gray said. “So, I think HighNoon will definitely help with that. And for those customers who aren’t using custom blends, batching HighNoon in the field will be more convenient than it is with products that require a slurry.”

Results customers can appreciate

Gray had a chance to see HighNoon in action when one of his customers applied it to about 40 miles of roadside in late summer 2025. He was impressed not only with the activity against notorious kudzu and other broadleaves, but also with the selectivity of HighNoon.

“The grasses looked very healthy,” he said. “We could see a very distinct line where we made the spray application, where we had kudzu on a bank and then grass closer to the road. A lot of homes in this area are close to the road, and it helps to know we won’t affect those grasses if we get a bit of overspray on the edge of a yard.”

Gray and his customer will inspect this same application site in spring 2026 to see how the control is standing up, but he noted, “If the results remain as we are currently seeing, then the plan for this customer is to implement the product into their whole program.”

Gray is convinced the combination of efficacy and ease of use will make HighNoon a valuable addition to his customers’ vegetation management toolkits. “One of the most impressive things about this product is that distinct line that shows you exactly where the pattern went down,” he said. “There’s almost no variation. It just consistently performs.”

^{Under normal field conditions, HighNoon® is nonvolatile. HighNoon has no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares), and meat animals prior to slaughter. Label precautions apply to forage treated with HighNoon and to manure and urine from animals that have consumed treated forage. HighNoon is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Consult the label for full details. Rinskor® is a registered active ingredient. Always read and follow label directions.
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