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Résistances aux herbicides : mécanismes, situation en France et bonnes pratiques

Abstract : Herbicide resistance is the outcome of weed adaptation to herbicide applications made by growers. This article describes the selection process of resistance and the two main categories of mechanisms involved: resistance linked to the target of the herbicide (TSR, Target-Site-based Resistance, which only concerns herbicides with the same mode of action), and resistance not linked to the target (NTSR, Non-Target-Sitebased Resistance, which can concern herbicides with different modes of action). We review the resistance situation in France, where resistance to herbicides has been demonstrated in 23 weed species to date. The practices allowing to reduce the speed of resistance selection or to maintain weed control efficacy are then described. They require a diversified, adaptable and effective weed control strategy, and must give priority to non-chemical weeding practices as a first approach.The application of herbicides should ideally be carried out by combining or alternating herbicide substances with different modes of action. The efficacy of these recommendations is illustrated by a modelling approach.
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Contributor : Noureddine El Mjiyad <>
Submitted on : Thursday, February 25, 2021 - 12:55:39 PM
Last modification on : Wednesday, June 2, 2021 - 3:39:00 AM


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Christophe Délye, Nathalie Colbach, Valérie Le Corre, Le Corre. Résistances aux herbicides : mécanismes, situation en France et bonnes pratiques. Innovations Agronomiques, INRAE, 2020, 81, pp.33-49. ⟨10.15454/8j8h-6610⟩. ⟨hal-03152155⟩



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