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FMC Introduces Authority Supreme
USAgNet - 03/19/2018

The U.S. Environmental Protection Agency and Canadian Pest Management Regulatory Agency have granted registration for Authority Supreme herbicide in sunflowers for the 2018 growing season. Authority Supreme, from FMC Corp., Philadelphia, Pa., is the only premix of sulfentrazone and pyroxasulfone and gives long-lasting residual control of small-seeded broadleaf weeds and grasses.

The new herbicide is effective against ALS, triazine, HPPD, ESPS (glyphosate) and PPO herbicide resistant weed biotypes, reports the National Sunflower Association. It controls a wide spectrum of weeds including waterhemp, Palmer amaranth, pigweed, nightshade, lambsquarters, kochia, morningglories, smartweed, foxtail, barnyard grass and fall panicum.

The herbicide is labeled for fall and spring preplant and preemergence applications, up to three days after planting. It can be used in Clearfield, ExpressSun, conventional, oil and confection sunflowers.

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