How Roundup Kills Weeds (And How Weeds are Fighting Back)

In 1997 there were 432 new patents for herbicides, by 2009 there were only 65. The development of broad spectrum glyphosate and “Roundup Ready crops” was a game changer that worked so well people basically stopped looking for new herbicides. That is until the weeds started fighting back.

Chemical & Engineering News article on the search for new modes of action

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Additional Sources:
Molecular basis for the herbicide resistance of Roundup Ready crops


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

The Pitfalls of Relating Weeds, Herbicide Use, and Crop Yield: Don’t Fall Into the Trap! A Critical Review

The cost of herbicide resistance

Development and Characterization of a CP4 EPSPS-Based, Glyphosate-Tolerant Corn Event

Tyrosine Biosynthesis, Metabolism, and Catabolism in Plants

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Auxin driven indoleamine biosynthesis and the role of tryptophan as an inductive signal in Hypericum perforatum (L.)

Finding of No Significant Impact
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Glyphosate resistance: state of knowledge

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