EPA approves Katagon corn herbicide for 2021

This postemergence premix offers two herbicide sites of action.

The Environmental Protection Agency has granted registration for Katagon herbicide from HELM Agro US, Inc.

Katagon is a next-generation HPPD inhibitor (Group 27) premix herbicide for postemergence use in field corn, offering two modes of action with the added benefits of a low use rate formulation, crop safety profile, and a wide application window, say company officials. 
 
A coformulation of the active ingredients tolpyralate and nicosulfuron, Katagon delivers highly effective control of broadleaf weeds plus enhanced grass control when used in combination with atrazine, say company officials. 
 
Katagon and atrazine together in a tank mix also provide residual activity for longer-lasting weed control performance, say company officials.

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


 
Flexibility That Fits


 
Katagon is labeled for use in field corn grown for grain, silage and seed, that are herbicide-resistant, conventional or non-GMO hybrids, say company officials. 
 
In product development trials, Katagon has demonstrated high performance ratings in crop safety and postemergence control of glyphosate, PPO inhibitor, triazine, and ALS-resistant weeds like Palmer amaranth, waterhemp, ragweed, lambsquarters, and foxtails, say company officials. 
 
Katagon’s unique coformulation of tolpyralate and nicosulfuron is the first of its kind in the United States, says Dave Schumacher, HELM Agro U.S. president. 
 
“In field trials, we’ve seen Katagon perform equal to if not better than several market leading post products on broadleaves and stubborn grasses,” said Schumacher in a news release. “Katagon is an ideal solution to help break the cycle of resistance without limiting growers’ ability to rotate to soybeans the following season.”
 
Market-Ready for 2021 
 
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. Postapplications that include atrazine can be applied to corn up to 12 inches tall. In a tank mix with Katagon, the maximum single application rate for atrazine is 2.0 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. With a low use rate, Katagon provides greater cost savings for grower and retailer alike, reducing container size, application rates, labor, and transportation expenses.
 
According to Schumacher, corn growers will be encouraged to use Katagon as part of a two-pass sequential weed control program to ensure three or more modes of actions are used within a single growing season, and in accordance with university recommendations and industry standards for weed resistance management. 

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