International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT CORN POPPY
(Papaver rhoeas)


ALS inhibitors (B/2)

Belgium, West Flanders
INTRODUCTION CORN POPPY
Corn Poppy (Papaver rhoeas) is a dicot weed in the Papaveraceae family.  In Belgium this weed first evolved resistance to Group B/2 herbicides in 2014 and infests Wheat.   Group B/2 herbicides are known as ALS inhibitors (Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)).  Research has shown that these particular biotypes are resistant to florasulam, and metsulfuron-methyl and they may be cross-resistant to other Group B/2 herbicides.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.

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QUIK STATS (last updated Jan 28, 2015 )

Common NameCorn Poppy
SpeciesPapaver rhoeas
GroupALS inhibitors (B/2)
Herbicidesflorasulam, and metsulfuron-methyl
LocationBelgium, West Flanders
Year2014
Situation(s)Wheat
Contributors - (Alphabetically)Sofie Claerhout, and Benny De Cauwer 
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NOTES ABOUT THIS BIOTYPE

DOSE RESPONSE

Benny De Cauwer
The susceptibility to metsulfuron-methyl and florasulam was examined in pot experiments with 7 doses of each herbicide and 3 replicates. The results showed high level of resistance (RI>23)  to both herbicides. 

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GENERAL

Benny De Cauwer
Province of West Flanders, coastal polder area. This biotype is present in only a few winter wheat fields (with narrow crop rotation).

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Corn Poppy biotype with this Corn Poppy biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on Group B/2 resistant Corn Poppy have not been reported to the site.  There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
 
Mechanism of Resistance

Studies on the mechanism of resistance of Group B/2 resistant Corn Poppy from Belgium indicate that resistance is due to an altered target site.  There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature
 
Relative Fitness

There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes.  If you have any information pertaining to the fitness of Group B/2 resistant Corn Poppy from Belgium please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

SOFIE CLAERHOUT
Weed Science Unit
Ghent University
Department of Plant Production
Faculty of Bioscience Engineering
Coupure Links 653
Gent, 9000, Flemish Region
Belgium
Email Sofie Claerhout
BENNY DE CAUWER
Doctor assistant, Research associate
University of Ghent, faculty of Bioscience-engineering
Dept. Plant Production
Weed Science Unit
Coupure Links 653
9000 Gent, 9000, Flemish Region
Belgium
Email Benny De Cauwer

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Belgium have been instrumental in providing you this information. Particular thanks is given to Sofie Claerhout, and Benny De Cauwer for providing detailed information.
Herbicide Resistant Corn Poppy Globally
(Papaver rhoeas)
Herbicide Resistant Corn Poppy Globally
(Papaver rhoeas)
Drag a column header and drop it here to group by that column
Herbicide Resistant Corn Poppy Globally
(Papaver rhoeas)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 2014 Wheat florasulam, and metsulfuron-methyl 3 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy10960
2 DenmarkDenmark 2003 Wheat iodosulfuron-methyl-sodium, and tribenuron-methyl 13 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy5346
3 FranceFrance 2007 Wheat iodosulfuron-methyl-sodium, mesosulfuron-methyl, and metsulfuron-methyl 17 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy5517
4 FranceFrance 2016 Cereals 2,4-D, iodosulfuron-methyl-sodium, MCPA, mesosulfuron-methyl, and metsulfuron-methyl 17 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
123Papaver rhoeasCorn Poppy15054
5 GermanyGermany 2012 Cereals, and Rapeseed florasulam, and imazamox 18 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy6743
6 GreeceGreece 1998 Winter wheat chlorsulfuron, florasulam, imazamox, pyrithiobac-sodium, thifensulfuron-methyl, triasulfuron, and tribenuron-methyl 19 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy1142
7 ItalyItaly 1998 Durum wheat florasulam, iodosulfuron-methyl-sodium, and tribenuron-methyl 24 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy1140
8 ItalyItaly 1998 Wheat 2,4-D, iodosulfuron-methyl-sodium, and tribenuron-methyl 24 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
123Papaver rhoeasCorn Poppy5679
9 ItalyItaly 1998 Wheat 2,4-D 24 Synthetic Auxins (O/4)
123Papaver rhoeasCorn Poppy5680
10 PolandPoland 2014 Winter wheat tribenuron-methyl 33 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy10983
11 SpainSpain 1993 Cereals, and Wheat 2,4-D, and tribenuron-methyl 38 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
123Papaver rhoeasCorn Poppy185
12 SwedenSweden 2011 Winter wheat amidosulfuron, iodosulfuron-methyl-sodium, and propoxycarbazone-sodium 40 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy8913
13 United KingdomUnited Kingdom 2001 Cereals metsulfuron-methyl 44 ALS inhibitors (B/2)
123Papaver rhoeasCorn Poppy5169
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Sunday, April 30, 2017 .  Available  www.weedscience.org
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