Reference : Black-grass Resistance to Herbicides: Three Years of Monitoring in Belgium
Scientific congresses and symposiums : Paper published in a book
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
Life sciences : Agriculture & agronomy
Black-grass Resistance to Herbicides: Three Years of Monitoring in Belgium
Henriet, François mailto [ > > ]
Maréchal, Pierre-Yves mailto [Université de Liège - ULiège > > > Form. doct. sc. agro. & ingé. biol.]
Communications in Agricultural and Applied Biological Sciences
Universiteit Gent. Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen
61st International symposium on crop protection
19 mai 2009
Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen, Universiteit Gent
[en] black-grass ; resistance ; ACCase, ALS inhibitors
[en] Black-grass (Alopecurus myosuroides HUDS.) is a common weed of cereal crops widely spread in Northern Europe. Even if the first Belgian case of resistance was reported in 1996, until now, Belgium was quite spared of this problem and only a few restricted areas were con-cerned: the Polders, the marshland of the Escaut River and the Fosses-la-Ville region.
About 90 seed samples were collected trough the South part of Belgium and in the Polders during July 2006, 2007 and 2008. These populations were tested in greenhouse conditions by spraying plantlets with herbicides of three modes of action. The herbicides used were photo-synthesis inhibitor, ACCase inhibitors and ALS inhibitors. Susceptible and resistant standard populations (Rohtamsted and Peldon) were included in the test in order to validate it and to permit wild populations classification according to “R” rating system.
Populations showed differences of susceptibility to photosynthesis inhibitor, ACCase inhibitors and ALS inhibitors. For each herbicide mode of action, it was possible to find at least one population in each resistance class of the “R” rating system. Furthermore, it appeared that resistance was not confined to restricted areas listed above anymore.

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