EPA registers Acuron GT herbicide

Acuron GT aims at enhanced postemergence weed control in corn.

The U.S. Environmental Protection Agency (EPA) has registered Acuron GT herbicide 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, Group 27), 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 broadleaves,” said Ryan Lins, Syngenta R&D scientist in Minnesota, in a Syngenta news release. “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 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 with 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 treatment,” said Scott Cully, Syngenta R&D scientist in Illinois, in a Syngenta news release. “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 with Halex GT.” 

Acuron GT delivers enhanced postemergence control of yield-robbing weeds and longer-lasting residual that enable it to deliver more bushels per acre than any other postemergence-plus-residual corn herbicide, including Halex GT, say Syngenta officials. 

Across 16 head-to-head replicated trials in glyphosate-tolerant corn, Acuron GT outyielded other postemergence-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,” said Mark Kitt, corn herbicide technical product lead at Syngenta, in a Syngenta news release.  “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 optimal yield protection, Syngenta recommends using Acuron GT early postemergence, before weeds reach 4 inches in height, in a planned two-pass program following preemergence applications of Lumax EZ, Lexar EZ, Bicep 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 which 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.” 

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