Depending on the species, weeds spread with the help of wind, water or by other means, but human factors seem to be the best way to spread weeds from field to field, across a state, from state to state and even from one country to a different one.
Recent research at Kansas State University has confirmed farmers' claims of Palmer amaranth being resistant to 2,4-D and dicamba — the first confirmed case of resistance to these herbicides, says Iowa State University Extension.
The likely sources were seeds carried by migratory birds, a used combine, an alternative feed source purchased out of state, custom combining and grain cleaned out of railroad cars.
Laboratory analysis confirmed that a plant found in a row-crop field in McIntosh County in south-central North Dakota is Palmer amaranth, says North Dakota State University Extension.
Kansas State University researchers have discovered how weeds develop resistance to the popular herbicide glyphosate, a finding that could have broad future implications in agriculture.
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On this episode of Conservation Ag Update, brought to you by Montag Manufacturing, growers from across the U.S. share their predictions for the upcoming planting season, including one no-tiller who’s “bullish” about a great spring.
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