A new herbicide from Dow AgroSciences is getting some nods of approval after recent research across the Midwest and Midsouth demonstrated superior burndown control on tough broadleaf weeds.
Powered by a new Group 4 growth regulator herbicide developed by Dow AgroSciences called Arylex active, Elevore is proven to effectively control labeled broadleaf weeds, including glyphosate- and ALS-resistant marestail, lambsquarters, cutleaf evening-primrose, and henbit. Elevore, which will be labeled for use prior to planting soybeans, corn, and cotton, will be available to farmers for the 2018 spring burndown season.
“We targeted glyphosate-resistant marestail between 5 and 8 inches in trials through Field Forward trials and are seeing superior control,” says Jeff Ellis, Ph.D., field scientist, Dow AgroSciences. “Elevore provided excellent activity on marestail across a wide range of geographies and at various heights, including 8-inch-tall marestail, preventing regrowth so farmers can plant into a clean field.”
Marestail is the first annual broadleaf weed with documented glyphosate resistance. If left uncontrolled, herbicide-resistant marestail can present huge challenges for farmers at planting and throughout the growing season. A single female marestail plant can produce approximately 200,000 seeds that are transported by wind, perpetuating the spread of herbicide-resistant populations.
The low use rate of 1 ounce per acre makes Elevore an excellent fit in reduced- and no-till production systems for burndown applications before planting soybeans, corn, and cotton. The no-till fit has retail agronomists like Levi Lehmkuhl, Hiawatha, Kansas, eager to incorporate Elevore herbicide into burndown program recommendations for his customers. More than 90 percent of soybean and corn acres in his northeastern Kansas trade territory are no-till.
“I went to the field every day after application and, the first three days, I questioned if anything was going to happen because nothing had really changed in the appearance of the weeds,” Lehmkuhl says. “And then I went over the next day, and things were completely wilted. The appearance had changed drastically — overnight. Elevore had smoked everything in its path.”
Visual signs of control don’t appear immediately because the active ingredient in Elevore herbicide, Arylex active, is absorbed by the plant’s cells, where the herbicide binds with specific auxin receptors in the cell’s nucleus. The delayed response is due to the gradual, albeit complete, absorption process. Once absorbed by the plant’s nucleus, Arylex active halts growth and the plant dies, providing complete control.
“Arylex active provides systemic control and does a great job of virtually eliminating the chance for regrowth of targeted plants,” Ellis says. “Symptoms on targeted plants are shown as typical auxin responses followed by necrosis and death. This type of plant control gives growers peace of mind that their fields will be cleaner at planting.”
Elevore should be applied with commonly used residual herbicides, such as Surveil herbicide, and burndown tank-mix partners, including 2,4-D and glyphosate, up to 14 days before planting soybeans.