Skip to main content

Syngenta US News

Syngenta announces EPA registration of enhanced post-emergence-plus-residual corn herbicide Acuron GT

GREENSBORO, N.C., USA, MARCH 4, 2021 – Syngenta announced today that its new corn herbicide, Acuron® GT, has been registered by the U.S. Environmental Protection Agency (EPA) for post-emergence use in glyphosate-tolerant corn and will be available for use this season, subject to state approvals.  

Acuron GT combines the proven performance of Halex® GT corn herbicide with the active ingredient bicyclopyrone (BIR), which helps Acuron GT provide enhanced post-emergence control of yield-robbing weeds and longer-lasting residual in glyphosate-tolerant corn.  

“Acuron GT has performed exceptionally well in field trials, averaging greater than 90% post-emergence control on all weed categories – large-seeded broadleaves and small-seeded broadleaves1,” said Ryan Lins, Syngenta R&D scientist in Minnesota. “In particular, its higher-level control of large-seeded broadleaves such as giant ragweed, morningglory and cocklebur, and pigweed species like Palmer amaranth and waterhemp, really sets Acuron GT apart from all other post-emergence-plus-residual herbicides.”  

The powerful combination of four active ingredients and three sites of action in Acuron GT also helps growers manage difficult weeds longer into the season, which helps fully protect yield potential and minimize the weed seed bank for next year’s crop. 

“Compared to Halex GT, field trials show Acuron GT provided an 8% increase in residual control of annual grass and small-seeded broadleaf weeds, and a 14% increase in residual control of Palmer amaranth when evaluated 42 to 56 days after treatment2,” says Scott Cully, Syngenta R&D scientist in Illinois. “The fact that Acuron GT may help growers achieve almost 90% control of weeds six to eight weeks after post-emergence application is a true testament to the residual power of bicyclopyrone, the additional unique active ingredient in Acuron GT compared to Halex GT2.” 

Acuron GT delivers enhanced post-emergence control of yield-robbing weeds and longer-lasting residual that enable it to deliver more bushels per acre than any other post-emergence-plus-residual corn herbicide, including Halex GT. Across 16 head-to-head replicated trials in glyphosate-tolerant corn, Acuron GT outyielded other post-emergence-plus-residual herbicides3

“It’s simple. Weeds steal sunlight, moisture and nutrients from the growing corn crop, so the better you can control those weeds, the less yield-robbing weed competition you’ll have,” says Mark Kitt, corn herbicide technical product lead at Syngenta. “We’re excited Acuron GT will raise the bar for post-emergence-plus-residual weed control in glyphosate-tolerant corn, resulting in higher potential yield and increased revenue for growers.”  

For optimum yield protection, Syngenta recommends using Acuron GT early post-emergence, before weeds reach 4 inches in height, in a planned two-pass program following preemergence applications of Lumax® EZLexar® EZBicep II Magnum®Bicep Lite II Magnum® or Dual II Magnum® herbicides.  

“When growers start with agronomics and a profitability goal in mind, they can better assess what practices and products will get them there,” Kitt said. “Using a residual preemergence herbicide is critical in a program with Acuron GT to deliver sound weed resistance management strategies, and to help protect yield and profit potential. Instead of committing to a season-long ‘deal’ that may limit choices, we are confident the math will show that better yield with Acuron GT is the better deal for growers.” 

To learn more, visit Join the conversation online — connect with Syngenta at

About Syngenta
Syngenta is one of the world’s leading agriculture companies, comprised of Syngenta Crop Protection and Syngenta Seeds. Our ambition is to help safely feed the world while taking care of the planet. We aim to improve the sustainability, quality and safety of agriculture with world-class science and innovative crop solutions. Our technologies enable millions of farmers around the world to make better use of limited agricultural resources. Syngenta Crop Protection and Syngenta Seeds are part of Syngenta Group with 49,000 people in more than 100 countries working to transform how crops are grown. Through partnerships, collaboration and the Good Growth Plan, we are committed to accelerating innovation for farmers and nature, striving for carbon neutral agriculture, helping people stay safe and healthy, and partnering for impact. To learn more visit and Follow us on Twitter at and

Media Contacts: 
David Pinon 

Michael Santos  

Web Resources: 
​​​​​​​AAtrex 4L 
Acuron GT 
Bicep II Magnum 
Bicep Lite II Magnum 
Dual II Magnum 
Halex GT 
Know More, Grow More 
Lexar EZ 
Lumax EZ 
Syngenta Newsroom 
Syngenta U.S. 

Cautionary Statement Regarding Forward-Looking Statements 
​​​​​​​This document may contain forward-looking statements, which can be identified by terminology such as ‘expect’, ‘would’, ‘will’, ‘potential’, ‘plans’, ‘prospects’, ‘estimated’, ‘aiming’, ‘on track’ and similar expressions. Such statements may be subject to risks and uncertainties that could cause the actual results to differ materially from these statements. For Syngenta, such risks and uncertainties include risks relating to legal proceedings, regulatory approvals, new product development, increasing competition, customer credit risk, general economic and market conditions, compliance and remediation, intellectual property rights, implementation of organizational changes, impairment of intangible assets, consumer perceptions of genetically modified crops and organisms or crop protection chemicals, climatic variations, fluctuations in exchange rates and/or commodity prices, single source supply arrangements, political uncertainty, natural disasters, and breaches of data security or other disruptions of information technology. Syngenta assumes no obligation to update forward-looking statements to reflect actual results, changed assumptions or other factors. 

All photos are either the property of Syngenta or are used with permission. 

Performance assessments are based on results or analysis of public information, field observations and/or internal Syngenta evaluations. Trials reflect treatment rates commonly recommended in the marketplace. 

1Syngenta Vero Beach Research Center, FL; 2020. 
Syngenta and external trials: IL, TX; 2019. 
Syngenta and external trials (HBI007A-2020US): CO, IN, KS, MI, NE, SD, TX, VA, WI, MO-1, MO-2, OH-1, OH-2, AR-2, IL-2, MN-2; 2020. 

©2021 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties. Please check with your local extension service to ensure registration status. Acuron, Bicep II Magnum, Bicep Lite II Magnum, Lexar EZ and Lumax EZ are Restricted Use Pesticides. Acuron®, Bicep II Magnum®, Bicep Lite II Magnum®, Dual II Magnum®, Halex®, Lexar®, Lumax® and the Syngenta logo are registered trademarks of a Syngenta Group Company. All other trademarks are property of their respective owners.