The factors driving evolved herbicide resistance at a national scale

Hicks, Helen L. and Comont, David and Coutts, Shaun and Crook, Laura and Hull, Richard and Norris, Ken and Neve, Paul and Childs, Dylan Z. and Freckleton, Robert P. (2018) The factors driving evolved herbicide resistance at a national scale. Nature Ecology & Evolution, 2 (3). pp. 529-536. ISSN 2397-334X

Full content URL: http://doi.org/10.1038/s41559-018-0470-1

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The factors driving evolved herbicide resistance at a national scale
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Abstract

Repeated use of xenobiotic chemicals has selected for the rapid evolution of resistance, threatening health and food security at a global scale. Strategies for preventing the evolution of resistance include cycling and mixtures of chemicals and diversification of management. We currently lack large-scale studies that evaluate the efficacy of these different strategies for minimizing the evolution of resistance. Here we use a national-scale data set of occurrence of the weed Alopecurus myosuroides (black-grass) in the United Kingdom to address this. Weed densities are correlated with assays of evolved resistance, supporting the hypothesis that resistance is driving weed abundance at a national scale. Resistance was correlated with the frequency of historical herbicide applications, suggesting that evolution of resistance is primarily driven by intensity of exposure to herbicides, but was unrelated directly to other cultural techniques. We find that populations resistant to one herbicide are likely to show resistance to multiple herbicide classes. Finally, we show that the economic costs of evolved resistance are considerable: loss of control through resistance can double the economic costs of weeds. This research highlights the importance of managing threats to food production and healthcare systems using an evolutionarily informed approach in a proactive not reactive manner.

Keywords:none
Subjects:D Veterinary Sciences, Agriculture and related subjects > D400 Agriculture
D Veterinary Sciences, Agriculture and related subjects > D414 Crop Protection
Divisions:College of Science > National Centre for Food Manufacturing > Lincoln Institute for Agri-Food Technology
ID Code:36655
Deposited On:23 Aug 2019 09:22

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