INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Common Chickweed Globally
(Stellaria media)
Herbicide Resistant Common Chickweed Globally
(Stellaria media)
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Herbicide Resistant Common Chickweed Globally
(Stellaria media)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 2013 Wheat metsulfuron-methyl 3 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed10959
2 Canada (Alberta) CanadaAlberta1988 Cereals, and Wheat chlorsulfuron, ethametsulfuron-methyl, imazamethabenz-methyl, metsulfuron-methyl, sulfometuron-methyl, and thifensulfuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed481
3 Canada (Saskatchewan) CanadaSaskatchewan2005 Spring Barley, and Wheat thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5322
4 Canada (Manitoba) CanadaManitoba2008 Peas thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5630
5 ChinaChina 2010 Winter wheat fluroxypyr, and MCPA 9 Auxin Mimics HRAC Group 4 (Legacy O)
 		168Stellaria mediaCommon Chickweed5658
6 DenmarkDenmark 1991 Spring Barley, and Wheat chlorsulfuron, florasulam, iodosulfuron-methyl-Na, and tribenuron-methyl 13 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed86
7 FinlandFinland 2013 Spring Barley tribenuron-methyl 139 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed9946
8 FranceFrance 2012 Wheat florasulam, iodosulfuron-methyl-Na, mesosulfuron-methyl, metsulfuron-methyl, and thifensulfuron-methyl 17 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5688
9 GermanyGermany 1978 Corn (maize) atrazine 18 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		168Stellaria mediaCommon Chickweed435
10 GermanyGermany 2011 Rapeseed, Spring Barley, and Wheat amidosulfuron, florasulam, imazamox, iodosulfuron-methyl-Na, mesosulfuron-methyl, nicosulfuron, pyroxsulam, thifensulfuron-methyl, tribenuron-methyl, triflusulfuron-methyl, and tritosulfuron 18 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed6744
11 IrelandIreland 1996 Cereals metsulfuron-methyl 81 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5089
12 LatviaLatvia 2016 Winter wheat amidosulfuron 174 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed15068
13 New ZealandNew Zealand 1995 Cereals chlorsulfuron 30 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed161
14 NorwayNorway 2002 Cereals iodosulfuron-methyl-Na, metsulfuron-methyl, and tribenuron-methyl 31 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5165
15 South AfricaSouth Africa 2002 Cereals chlorsulfuron, metsulfuron-methyl, thifensulfuron-methyl, and triasulfuron 37 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5193
16 SwedenSweden 1995 Spring Barley, Spring wheat, and Winter wheat chlorsulfuron, florasulam, and tribenuron-methyl 40 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed510
17 United KingdomUnited Kingdom 1985 Cereals, and Wheat mecoprop 44 Auxin Mimics HRAC Group 4 (Legacy O)
 		168Stellaria mediaCommon Chickweed358
18 United KingdomUnited Kingdom 2000 Cereals florasulam, and metsulfuron-methyl 44 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5088
19 United States (Virginia) United StatesVirginia2008 Wheat thifensulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5373
20 United States (Maryland) United StatesMaryland2009 Wheat chlorsulfuron, mesosulfuron-methyl, thifensulfuron-methyl, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5374
21 United States (Pennsylvania) United StatesPennsylvania2010 Alfalfa, Spring Barley, and Wheat pyroxsulam, thifensulfuron-methyl, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed7898
22 United States (Delaware) United StatesDelaware2012 Wheat thifensulfuron-methyl, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed5708
23 United States (Kentucky) United StatesKentucky2013 Wheat chlorsulfuron, flucarbazone-Na, thifensulfuron-methyl, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed7883
24 United States (California) United StatesCalifornia2022 Triticale, and Wheat mesosulfuron-methyl, pyroxsulam, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		168Stellaria mediaCommon Chickweed24253
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