Researchers found that a grass and legume cover crop combination produced the most biomass and reduced emergence of glyphosate-resistant Palmer amaranth by half.
Gramoxone is the most effective burndown option for Palmer amaranth, especially in cases of PPO-resistant palmer, says University of Tennessee Extension.
The Weed Science Society of America ranked Palmer amaranth as the most troublesome weed in the U.S., while Galium was determine the most troublesome weed in Canada.
Palmer amaranth has to date been found in about 11 Ohio counties, but there isn’t any real pattern to the distribution, says Ohio State University Extension.
From December 16th - January 15th, we asked No-Till Farmer readers: "Do you know of or suspect glyphosate resistance on your farm to any of the following weeds or grasses?"
With herbicide-resistant Palmer amaranth and kochia marching across the Plains, growers must focus on rotating chemistries, slowing down their spray rig and mixing products properly, experts say.
Herbicide-resistant weeds are nothing new in the farming landscape, but “bulletproof” Palmer amaranth and kochia are becoming more of a concern because of the long-standing reliance on glyphosate applications.
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Franck Groeneweg, who no-tills a variety of crops on more than 12,000 acres near Three Forks, Mont., shares how his massive Johnson-Su bioreactor system allows him to apply compost extract in furrow during planting season.
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