Giant ragweed in Minnesota. Waterhemp in Missouri. Palmer pigweed in Mississippi. During 2010, growers and retailers across the U.S. shared the reality of glyphosate-resistant weeds in their fields – and successful solutions.
“We know glyphosate is great on grasses, but we’ve got resistant waterhemp in our area. The waterhemp has been an issue for probably four to five years, and then the marestail has just kept getting worse over the past three years," said a southern Illinois retailer, “So we always get something out there early that we count on to control these weeds."
Good options for pre-emergence control of problem weeds in soybeans are Prefix® or Boundary® herbicides, and they worked well in 2010. For example, a Nebraska retailer said, “We really try to enforce a pre-emerge herbicide on beans to kill weeds early and get out of a straight glyphosate program, and Prefix plays into that type of program well. Growers usually follow up with a post-emergence application of glyphosate and we’ve been very pleased with the results."
A Mount Olive, N.C., grower said, “Boundary works really well, especially if you put it on early. It controls the weeds until the beans can shade them out. I used Flexstar® GT as well, and it’s the only thing that I’ve found that can touch resistant Palmer pigweed – the only thing!"
For residual control post-emergence, Flexstar GT herbicide is an ideal option, particularly in a planned two-pass program with Boundary.
A retailer in New Sharon, Iowa, explained that having Flexstar in the tank with the glyphosate (Flexstar GT) really helped control broadleaf weeds in-sea