Growers worldwide have been battling herbicide-resistant (HR) weeds since the early 1970s. How will they manage HR weeds over the next 20 years? This somewhat speculative prognosis by someone having worked in this area for 25 years examines both chemical and non-chemical aspects of HR weed management and their integration. Non-herbicidal aspects include better cover crops, crop rotations, and mechanical weed control, robotics, and harvest weed seed control. Herbicidal aspects include novel herbicides with new sites of action or mode of metabolism, better herbicides, synergists, stacked-HR trait crops, mixtures, and site-specific weed management. What role will nanotechnology, RNAi technology, 'omics', and modeling/decision-support systems play in future HR weed management? More comprehensive and efficient surveillance and diagnostic systems using drones and (near) real-time HR allele detection holds promise in aiding timely HR weed management.

Managing herbicide-resistant weeds over the next 20 years

248th National Meeting (2014)

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