The emergence of glyphosate resistant weeds has renewed investment and focus on weed control technologies, including new herbicides with new modes of action.  A look at the numbers of issued US patents covering herbicide innovations indicates a steep drop following the introduction of glyphosate resistance crops in the late 1990s, a trend that has only recently been reversed.  A review of these new patents indicates few describe materials with unknown modes of action, reflecting both the challenge of identifying such materials and an industry-wide effort to fully leverage existing modes of action.  A number of herbicide-tolerance traits are to be released in the next 2-5 years and stacked on top of glyphosate tolerance to broaden the weed control spectrum and incorporate underexploited modes of action into herbicide-tolerant cropping systems.  The durability of these systems will depend on whether they are utilized as part of broader weed control programs.

New herbicides and herbicide solutions to combat weed resistance

244th National Meeting (2012)

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