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Invader batters rural America, shrugging off herbicides : glyphosate resistance

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  • Teresa Binstock
    Invader batters rural America, shrugging off herbicides By
    Message 1 of 1 , Aug 12, 2014
      Invader batters rural America, shrugging off herbicides

      By Michael Wines
      New York Times 12 August 2014

      Palmer amaranth is the most notorious of a growing number of weeds that are immune to the gold standard of herbicides, glyphosate. With a stalk up to six inches thick, it can damage farm equipment. Glyphosate-resistant palmers first surfaced in 2005, in Georgia. They are now in 24 states.

      Constantly dousing crops in glyphosate has exacted a price. Weeds with glyphosate-resisting genetic mutations appeared faster and more often in 16 types of weed so far in the United States. A 2012 survey concluded that glyphosate-resistant weeds had infested enough acreage of American farmland to cover a plot nearly as big as Oregon, and that the total infestation had grown 51 percent in one year.




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