Next year's success with rainfed crops depends on water saved this year so producers should retain wheat residues, but they need to keep weeds under control, said a University of Nebraska-Lincoln specialist.
Western Nebraska crops specialist Bob Klein, recommends spraying with glyphosate "right after wheat harvest." The ideal time to spray is five days after a rain, he said.
"If you can, wait until you have good growing conditions," he said. "Weeds take up the chemicals better when they're actively growing."
Klein advised a split treatment program starting shortly after harvest with glyphosate and following up about September 1 or 10 with Atrazine plus a burn down herbicide if needed. Producers might add 2,4-D or Banvel to the first treatment, depending on the weeds.
He said that producers often have to shift to amine formulations of 2,4-D to keep volatilization under control during the first treatment. If the temperature is under 80 degrees during treatment and for the rest of the day, volatilization is probably not an issue. If temperatures get much over 80 degrees, though, producers might want to switch formulations.
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