INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Corn Poppy Globally
(Papaver rhoeas)
Herbicide Resistant Corn Poppy Globally
(Papaver rhoeas)
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Herbicide Resistant Corn Poppy Globally
(Papaver rhoeas)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 2014 Wheat florasulam, and metsulfuron-methyl 3 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy10960
2 DenmarkDenmark 2003 Wheat florasulam, iodosulfuron-methyl-Na, and tribenuron-methyl 13 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy5346
3 FranceFrance 2007 Wheat iodosulfuron-methyl-Na, mesosulfuron-methyl, and metsulfuron-methyl 17 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy5517
4 FranceFrance 2015 Wheat 2,4-D, and aminopyralid 17 Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy18176
5 FranceFrance 2016 Cereals 2,4-D, aminopyralid, iodosulfuron-methyl-Na, MCPA, mesosulfuron-methyl, and metsulfuron-methyl 17 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy15054
6 GermanyGermany 2012 Cereals, and Rapeseed florasulam, and imazamox 18 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy6743
7 GreeceGreece 1998 Winter wheat chlorsulfuron, florasulam, imazamox, pyrithiobac-sodium, thifensulfuron-methyl, triasulfuron, and tribenuron-methyl 19 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy1142
8 GreeceGreece 2002 Wheat 2,4-D, iodosulfuron-methyl-Na, and mesosulfuron-methyl 19 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy18174
9 ItalyItaly 1998 Durum wheat florasulam, iodosulfuron-methyl-Na, and tribenuron-methyl 24 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy1140
10 ItalyItaly 1998 Wheat 2,4-D, iodosulfuron-methyl-Na, and tribenuron-methyl 24 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy5679
11 ItalyItaly 1998 Wheat 2,4-D 24 Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy5680
12 MoroccoMorocco 2025 Durum wheat, and Wheat 2,4-D, florasulam, and tribenuron-methyl 166 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy32277
13 PolandPoland 2014 Winter wheat tribenuron-methyl 33 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy10983
14 PortugalPortugal 2018 Wheat 2,4-D, and tribenuron-methyl 34 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy28267
15 PortugalPortugal 2018 Wheat tribenuron-methyl 34 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy28271
16 SpainSpain 1993 Cereals, and Wheat 2,4-D, and tribenuron-methyl 38 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy185
17 SwedenSweden 2011 Winter wheat amidosulfuron, iodosulfuron-methyl-Na, and propoxycarbazone-Na 40 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy8913
18 TunisiaTunisia 2025 Durum wheat, and Wheat 2,4-D, florasulam, and tribenuron-methyl 78 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		123Papaver rhoeasCorn Poppy32278
19 United KingdomUnited Kingdom 2001 Cereals metsulfuron-methyl 44 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		123Papaver rhoeasCorn Poppy5169
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Sunday, October 4, 2026.  Available at  www.weedscience.org

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