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EPA registers new Helm Agro herbicide premix

palmer pigweed

Palmer amaranth, also known as Palmer pigweed — photo courtesy University of Georgia

Helm Agro US Inc. has received federal registration from the U.S. Environmental Protection Agency for Katagon, an HPPD premix herbicide for psotemergence use in field corn.

It contains two modes of action — tolpyralate and nicosulfuron — with the added benefits of a low use-rate formulation, crop safety profile and a wide application window.

When used as a tankmix with atrazine, Ketagon provides enhanced grass control, according to a news release.

The herbicide premix was developed by Ishihara Sangyo Kaisha Ltd. Earlier this year, Helm Agro US and ISK Biosciences Corp., a subsidiary of Ishihara Sangyo Kaisha, agreed to collaborate on the distribution of Katagon herbicide for the U.S. crop protection market.

Katagon is labeled for use in field corn hybrids grown for grain, silage or seed and that are herbicide-resistant, conventional or non-GMO.

In product development trials, it demonstrated high performance ratings in crop safety and postemergence control of glyphosate-, PPO-, triazine- and ALS-resistant weeds, such as Palmer amaranth, waterhemp, ragweed, lambsquarters and foxtails.

Available to corn growers for the 2021 season, Katagon is classified as a Group 27 and Group 2 herbicide with a use rate of 2.3 to 3.4 fluid ounces per acre. It can be applied by itself or in combination with atrazine as an early to mid-season postemergence treatment.

When used alone, Katagon can be applied on corn up to 20-inches tall or the V5 growth stage, whichever is most restrictive. Post applications that include atrazine can be applied to corn up to 12 inches tall. In a tankmix with Katagon, the maximum single application rate for atrazine is 2 pounds per acre and not to exceed 2.5 pounds of atrazine per acre per year.

Katagon is formulated as an oil dispersion containing 1 pound of tolpyralate per gallon and 1 pound of nicosulfuron per gallon.