- PRODUCTION -
Alternate MOA Postemerge
North Carolina producer gets postemerge control of glyphosate-resistant weeds in soybeans from a product that he typically uses in his cotton defoliant program.
“ET is great herbicide for stopping weeds at the small stage as well as when they get a little bigger,” says Roberson, who lives in Robersonville. “I applied the tankmix over the top for glyphosate-resistant pigweed when they were about six inches tall. It totally destroyed the glyphosate-resistant pigweed; it just burned them right up! It also provided good control of other weeds, including morningglory and cocklebur.”
Short term speckling
Postemergent applications of ET on soybeans will typically cause temporary herbicidal speckling; however, this speckling will not occur on new growth.
Roberson noticed his ET plus glyphosate application speckled his treated beans last year. “But give it three to four days, and the soybeans will come right out it,” he says. “After two weeks, you won’t even know that you sprayed it. We did not lose any yield. As a matter of fact, the ET-treated beans were probably some of my better yielders.”
This North Carolina grower normally starts his soybean weed control program with a burndown application in mid-April with glyphosate, 2,4-D and Valor. “After I plant my soybeans, I apply Prefix,” Roberson says.
“Once the soybeans emerge, I will get in an application of Roundup. Then about 14 to 15 days later when another flush of weeds comes in, I will go back with the ET plus Roundup tankmix, which keeps my soybean fields real clean.”
Roberson always plants a portion of his soybeans in maturity groups VI and VII. He farms no-till and plants on 7 1/2-inch centers. He starts planting full season soybeans the last week of April or first week of May.
“If I am planting behind wheat, I will probably begin planting in the first week of June if moisture permits,” he says. “With my crop inputs, my dryland soybeans normally average around 40 to 45 bushels per acre. This past season was very dry, so we averaged about 30 bushels per acre.”
ET is a very versatile, effective product in Roberson’s operation. He has used it for many years as a cotton defoliant, but now it provides him a new tool for postemergence control of glyphosate-resistant weeds in his soybean crop.
Ninchino America contributed information for this article.