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New Broadleaf Burndown Option Coming from Dow AgroSciences

Farmer and retailer trials conducted across the Mid-South and Midwest through Dow AgroSciences’ Field Forward on-farm research program showed superior burndown control on tough broadleaf weeds using Elevore herbicide.

Powered by a new Group 4 growth regulator herbicide developed by Dow AgroSciences called Arylex active, Elevore has shown effective control of labeled broadleaf weeds, including glyphosate- and ALS-resistant marestail, lambsquarters, cutleaf evening-primrose and henbit.

Registration for Elevore – which will be labeled for use prior to planting cotton, soybeans and corn – is pending. It is expected to be available to farmers for the 2018 spring burndown season.

“We targeted glyphosate-resistant marestail between 5 and 8 inches through Field Forward trials and are seeing superior control,” says Jeff Ellis, Dow AgroSciences field scientist. “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 one ounce per acre makes Elevore an excellent fit in reduced- and no-till production systems for burndown applications before planting cotton, soybeans and corn. The no-till fit has retail agronomists eager to incorporate the product into burndown program recommendations.

“I went to the field every day after application,” says Levi Lehmkuhl, Hiawatha, KS. “The first three days, I questioned if anything was going to happen, because nothing had really changed in the appearance of the weeds. The next day, 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 Arylex active in Elevore herbicide 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.

 

Source – Dow AgroSciences

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