INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Kochia Globally
(Kochia scoparia)
Herbicide Resistant Kochia Globally
(Kochia scoparia)
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Herbicide Resistant Kochia Globally
(Kochia scoparia)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ArgentinaArgentina 2025 Corn (maize), Fallow, Soybean, Sunflower, Wheat, and Winter barley imazamox, and imazapyr 48 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia31277
2 Canada (Manitoba) CanadaManitoba1988 Industrial sites, Spring Barley, and Wheat chlorsulfuron, imazethapyr, metsulfuron-methyl, thifensulfuron-methyl, triasulfuron, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia57
3 Canada (Saskatchewan) CanadaSaskatchewan1988 Cropland, and Wheat thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia5069
4 Canada (Alberta) CanadaAlberta1989 Spring Barley, and Wheat chlorsulfuron, metsulfuron-methyl, thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia65
5 Canada (Alberta) CanadaAlberta2012 Spring Barley, and Wheat glyphosate, thifensulfuron-methyl, and tribenuron-methyl 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5592
6 Canada (Saskatchewan) CanadaSaskatchewan2012 Canola, Spring Barley, and Wheat glyphosate, thifensulfuron-methyl, and tribenuron-methyl 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia7834
7 Canada (Manitoba) CanadaManitoba2014 Corn (maize), and Soybean glyphosate, thifensulfuron-methyl, and tribenuron-methyl 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia9942
8 Canada (Saskatchewan) CanadaSaskatchewan2015 Spring wheat dicamba, fluroxypyr, thifensulfuron-methyl, and tribenuron-methyl 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia11032
9 Canada (Alberta) CanadaAlberta2017 Canola, Corn (maize), Fallow, Lentils, Peas, Wheat, and Winter barley dicamba, glyphosate, thifensulfuron-methyl, and tribenuron-methyl 7 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia17147
10 Canada (Saskatchewan) CanadaSaskatchewan2021 Mustard saflufenacil 7 Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
 		101Kochia scopariaKochia25259
11 Czech RepublicCzech Republic 1996 Railways, and Roadsides atrazine, chlorsulfuron, imazapyr, metsulfuron-methyl, nicosulfuron, prosulfuron, rimsulfuron, sulfosulfuron, thifensulfuron-methyl, tribenuron-methyl, and triflusulfuron-methyl 12 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia5050
12 SpainSpain 2022 Wheat, and Winter barley 2,4-D, glyphosate, MCPA, and thifensulfuron-methyl 38 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia31275
13 United States (Kansas) United StatesKansas1976 Corn (maize), and Railways atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia1070
14 United States (Colorado) United StatesColorado1982 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia431
15 United States (Montana) United StatesMontana1984 Railways atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia414
16 United States (Wyoming) United StatesWyoming1984 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia1051
17 United States (Iowa) United StatesIowa1985 Railways atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia243
18 United States (Wisconsin) United StatesWisconsin1987 Corn (maize), and Railways atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia416
19 United States (North Dakota) United StatesNorth Dakota1987 Cropland, and Wheat chlorsulfuron, and metsulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia423
20 United States (Kansas) United StatesKansas1987 Cropland, and Wheat chlorsulfuron 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1042
21 United States (New Mexico) United StatesNew Mexico1988 Railways, and Roadsides sulfometuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia256
22 United States (South Dakota) United StatesSouth Dakota1988 Cropland, and Wheat chlorsulfuron 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia269
23 United States (Idaho) United StatesIdaho1989 Roadsides, and Wheat chlorsulfuron 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia232
24 United States (Montana) United StatesMontana1989 Cropland, and Wheat chlorsulfuron, and metsulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia420
25 United States (Washington) United StatesWashington1989 Cereals, and Wheat chlorsulfuron 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia517
26 United States (Colorado) United StatesColorado1989 Roadsides, and Wheat metsulfuron-methyl, and triasulfuron 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1049
27 United States (Illinois) United StatesIllinois1992 Cropland, and Railways atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia238
28 United States (Oklahoma) United StatesOklahoma1992 Roadsides, and Wheat chlorsulfuron, metsulfuron-methyl, and sulfometuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1069
29 United States (Oregon) United StatesOregon1993 Wheat chlorsulfuron, metsulfuron-methyl, and triasulfuron 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1175
30 United States (Minnesota) United StatesMinnesota1994 Cropland, and Wheat imazethapyr, thifensulfuron-methyl, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia248
31 United States (Montana) United StatesMontana1994 Cropland, and Wheat dicamba, and fluroxypyr 45 Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia532
32 United States (Indiana) United StatesIndiana1995 Railways atrazine, cyanazine, and metsulfuron-methyl 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia405
33 United States (North Dakota) United StatesNorth Dakota1995 Wheat dicamba 45 Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia1047
34 United States (Illinois) United StatesIllinois1995 Corn (maize), Cropland, and Wheat atrazine, and metsulfuron-methyl 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia1126
35 United States (Wisconsin) United StatesWisconsin1995 Roadsides sulfometuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1169
36 United States (Wyoming) United StatesWyoming1996 Wheat metsulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1050
37 United States (Idaho) United StatesIdaho1997 Roadsides dicamba 45 Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia1058
38 United States (Utah) United StatesUtah1998 Industrial sites sulfometuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia1090
39 United States (North Dakota) United StatesNorth Dakota1998 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia1192
40 United States (Texas) United StatesTexas1998 Wheat metsulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia5063
41 United States (Colorado) United StatesColorado1999 Corn (maize) dicamba 45 Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia7868
42 United States (North Dakota) United StatesNorth Dakota2004 Railways diuron, metribuzin, and tebuthiuron 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia10986
43 United States (Michigan) United StatesMichigan2005 Sugar beets imazamox, and triflusulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		101Kochia scopariaKochia5287
44 United States (Kansas) United StatesKansas2007 Corn (maize), Cotton, and Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5470
45 United States (Nebraska) United StatesNebraska2009 Corn (maize) dicamba 45 Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia5594
46 United States (South Dakota) United StatesSouth Dakota2009 Corn (maize), and Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5636
47 United States (Nebraska) United StatesNebraska2011 Corn (maize), and Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5585
48 United States (North Dakota) United StatesNorth Dakota2012 Corn (maize), and Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5683
49 United States (Montana) United StatesMontana2012 Cereals glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5711
50 United States (Colorado) United StatesColorado2012 Cereals glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia5714
51 United States (Oklahoma) United StatesOklahoma2013 Corn (maize) glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia6755
52 United States (Montana) United StatesMontana2013 Wheat glyphosate, metsulfuron-methyl, thifensulfuron-methyl, and tribenuron-methyl 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia7810
53 United States (Kansas) United StatesKansas2013 Corn (maize) atrazine, chlorsulfuron, dicamba, and glyphosate 45 Multiple Resistance: 4 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia10972
54 United States (Kansas) United StatesKansas2013 Corn (maize), and Sorghum dicamba, fluroxypyr, and glyphosate 45 Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
Auxin Mimics HRAC Group 4 (Legacy O)
 		101Kochia scopariaKochia10973
55 United States (Nebraska) United StatesNebraska2014 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		101Kochia scopariaKochia9926
56 United States (Oregon) United StatesOregon2014 Corn (maize), and Sugar beets glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia9944
57 United States (Idaho) United StatesIdaho2014 Corn (maize), and Sugar beets glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia9945
58 United States (Wyoming) United StatesWyoming2014 Sugar beets glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		101Kochia scopariaKochia10961
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