6533b82cfe1ef96bd128f1d8
RESEARCH PRODUCT
Herbicides do not fabricate resistance: evidence from herbaria collections
Christophe DélyeChrystel DeulvotKarelle BoucansaudSéverine MichelFanny PerninBruno Chauvelsubject
[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesherbicide[SDV]Life Sciences [q-bio][SDE]Environmental Sciencesherbier[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyVulpin (Alopecurus myosuroides)résistancedonnées historiquesdescription
Can herbicide resistance genes be present in weed populations that have never been sprayed with herbicides? In order to answer this question, the presence of a mutation endowing herbicide resistance has been investigated in black-grass (Alopecurus myosuroides) herbarium specimens collected between 1788 and 1975. Among the 734 specimens investigated, one that had been collected in 1888 contained a mutation at ACCase codon 1781 that confers resistance to ACCase-inhibiting herbicides (APPs, CHDs and DEN). This clearly demonstrates that herbicides do not fabricate resistance. Resistance is naturally present in weed populations the fields prior to herbicide use. Herbicides only reveal pre-existing resistance by favouring the reproduction of resistant weed individuals. Resistance is thus a hazard: the more treated plants, the higher the risk to encounter a resistant one.
year | journal | country | edition | language |
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2013-12-10 |