Why have no new herbicide modes of action appeared in recent years?

  title={Why have no new herbicide modes of action appeared in recent years?},
  author={Stephen O Duke},
  journal={Pest management science},
  volume={68 4},
Herbicides with new modes of action are badly needed to manage the evolution of resistance of weeds to existing herbicides. Yet no major new mode of action has been introduced to the market place for about 20 years. There are probably several reasons for this. New potential products may have remained dormant owing to concerns that glyphosate-resistant (GR) crops have reduced the market for a new herbicide. The capture of a large fraction of the herbicide market by glyphosate with GR crops led… CONTINUE READING
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