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Syngenta submits HiFlex label expansion aimed at giving corn growers greater herbicide program flexibility

EPA review underway for proposed expansion to bicyclopyrone-containing corn herbicide labels; registration anticipated ahead of the 2027 growing season.

GREENSBORO, N.C., U.S.A., Oct. 12, 2026 – Syngenta announced it has submitted a proposed HiFlex™ label expansion to the U.S. Environmental Protection Agency that, pending approval, would expand weed management flexibility for corn growers using bicyclopyrone-containing corn herbicides, including Storen®, Acuron®, Acuron Flexi and Acuron GT herbicides.

With approval anticipated for the 2027 growing season, the proposed HiFlex label expansion is projected to double the maximum rate of bicyclopyrone growers are allowed to use each year. This is expected to give growers expanded options for customized, overlapping residual herbicide programs.

“Growers have told us they want flexible programs that allow them to better position active ingredients throughout the season based on their weed pressures and management practices,” said Syngenta Technical Product Lead Mark Kitt. “Once approved, the HiFlex label expansion would give growers the option to use Storen, Acuron or Acuron Flexi preemergence followed by a postemergence application of Acuron GT, which is not permitted on current labels.”

The proposed HiFlex label expansion would also increase the maximum single application rates of Storen, Acuron Flexi and Acuron GT. Upon registration:

  • Storen users will have the flexibility to use up to 3.1 qts./A — 29% more than the current max rate of 2.4 qts./A.
  • Acuron Flexi users will have the flexibility to use up to 3 qts./A — 33% more than the current max rate of 2.25 qts./A.
  • Acuron GT users will have the flexibility to use up to 4.5 pts./A — 20% more than the current max rate of 3.75 pts./A.

For more information about the upcoming HiFlex label expansion reach out to your local Syngenta representative.

Media Contacts
Julie Richards
919-805-2358
julie.richards@syngenta.com

Cameron Alexander
704-941-1565
calexander@gscommunications.com

Web Resources:
Syngenta Newsroom
Syngenta U.S.
Thrive

About Syngenta Crop Protection
Syngenta is a global leader in agricultural innovation with a presence in more than 90 countries. Syngenta is focused on developing technologies and farming practices that empower farmers, so they can make the transformation required to feed the world’s population while preserving our planet. Its bold scientific discoveries deliver better benefits for farmers and society on a bigger scale than ever before. Guided by its Sustainability Priorities, Syngenta is developing new technologies and solutions that support farmers to grow healthier plants in healthier soil with a higher yield. Syngenta Crop Protection is headquartered in Basel, Switzerland; Syngenta Seeds is headquartered in the United States. Read our stories and follow us on LinkedIn, Instagram & X.

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© 2026 Syngenta. 410 Swing Road, Greensboro, NC, 27409. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. Please check with your local extension service to ensure registration and proper use. Acuron is a Restricted Use Pesticide. Acuron®, HiFlex™, Storen® and the Syngenta logo are trademarks of a Syngenta Group Company. All other trademarks are the property of their third-party owners.