Broadleaf, grass herbicide rebooted for corn crops in East

Growers of field, seed and sweet corn in Eastern Canada will get another herbicide option this year for use against broadleaf weeds and grasses in their crops.

BASF Canada on Monday announced it has picked up regulatory approval for Armezon, carrying the active ingredient topramezone, in Eastern Canada.

Armezon will be classified in herbicide Group 27, alongside the actives in products such as Syngenta’s Callisto and Bayer’s Converge.

The new brand is a revival by BASF, which had previously marketed topramezone in the East under the name Impact. Armezon, like Impact, will be sold in suspension form at a concentration of 336 grams per litre.

Armezon’s label clears it for tank mixes with atrazine; atrazine and glyphosate; and atrazine and BASF’s dimethenamid-P (Group 15) herbicide Frontier Max.

The product "will offer growers the crop safety and application flexibility they’re looking for in seed, sweet and field corn," Andrew Elgersma, the company’s marketing manager for eastern herbicides, said in a release.

Tank-mixed with atrazine, Armezon is approved for post-emergence control of common annuals in seed and sweet corn crops, including lady’s thumb, lamb’s-quarters, common ragweed, Eastern black nightshade and redroot pigweed. The tank-mix also provides "fast knockdown of annual grasses," BASF said.

Armezon’s tank mix with glyphosate and atrazine, for use in glyphosate-tolerant corn crops, is to allow growers "an additional mode of action that not only acts as a resistance management tool, but also provides fast grass knockdown and improved control of tough broadleaf weeds" compared to glyphosate alone, BASF said.

The product’s tank mix with atrazine and Frontier Max, for use strictly in field corn, is to be applied when the field corn is at its one- to three-leaf stage, broadleaf weeds are at the one- to eight-leaf stage and grasses are at the one- to four-leaf stage.

BASF Canada originally took on the Impact brand in Canada in 2007 through a sales and marketing deal it signed in 2006. The product’s developer, California-based ag chem firm Amvac, still sells topramezone to corn growers in the U.S. under the Impact name.

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