Fierce Herbicide (active ingredients: flumioxazin + pyroxasulfone), the newest residual from Valent U.S.A. Corporation, has received US EPA registration in soybeans. Fierce, which received registration for corn earlier this year, is now available to soybean growers for the longest-lasting, broadest spectrum control of broadleaves and grasses, including species that are resistant to glyphosate and other chemistries.

In a series of university and private trials from 2010 to 2012, the new herbicide provided two more weeks of residual control than competitive herbicides of key weeds and grasses, including Palmer amaranth, waterhemp, lambsquarters, velvetleaf, dandelion, marestail, annual nightshades, pigweed species and annual grasses. Additional data indicated that Fierce showed strong results in crop safety.

"With all the challenges and uncertainties growers face each spring, they need a preemerge herbicide they can trust — one that will hold off tough broadleaves and grasses that reduce the amount of moisture and nutrients the crop can use to maximize yield,” said Trey Soud, Valent product manager. “Only Fierce consistently provides the superior broadleaf and grass control that growers need to help manage resistant weeds and increase profits.”

Fierce combines a new chemistry for grass and broadleaf control — pyroxasulfone developed by Kumiai Chemical Industry Co., Ltd. — with Valor Herbicide, a proven tough weed solution that contains the most used preemergence active ingredient in soybeans. Fierce can be applied up to three days after planting soybeans or up to seven days before planting no-till or reduced-tillage corn. It is one of the only products that gives growers flexibility to plant soybeans or corn.

"Growers know and believe in the excellent control Valor brings to their weed programs,” Soud said. “By combining Valor with pyroxasulfone to form Fierce, growers will have a single herbicide to tackle the toughest weeds and grasses."