International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Common Ragweed Globally
(Ambrosia artemisiifolia)
Herbicide Resistant Common Ragweed Globally
(Ambrosia artemisiifolia)
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Herbicide Resistant Common Ragweed Globally
(Ambrosia artemisiifolia)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Canada (Ontario) CanadaOntario1976 Corn (maize), and Cropland atrazine 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
18Ambrosia artemisiifoliaCommon Ragweed59
2 Canada (Quebec) CanadaQuebec1999 Carrots linuron 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
18Ambrosia artemisiifoliaCommon Ragweed5064
3 Canada (Quebec) CanadaQuebec1999 Carrots linuron, and metribuzin 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
18Ambrosia artemisiifoliaCommon Ragweed17128
4 Canada (Ontario) CanadaOntario2000 Soybean chlorimuron-ethyl, cloransulam-methyl, and imazethapyr 7 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed5471
5 Canada (Quebec) CanadaQuebec2007 Soybean cloransulam-methyl, and imazethapyr 7 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed17127
6 Canada (Ontario) CanadaOntario2012 Soybean chlorimuron-ethyl, cloransulam-methyl, glyphosate, and imazamethabenz-methyl 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5713
7 FranceFrance 2013 Chickpea, Soybean, and Sunflower imazamox, metsulfuron-methyl, and tribenuron-methyl 17 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed21230
8 SerbiaSerbia 2019 Corn (maize), Soybean, Sugar beets, and Sunflower imazamox, thiencarbazone-methyl, and tribenuron-methyl 245 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed20224
9 UkraineUkraine 2023 Sunflower amidosulfuron, carfentrazone-ethyl, flazasulfuron, flumetsulam, foramsulfuron, imazamox, imazapyr, iodosulfuron-methyl-Na, nicosulfuron, and thiencarbazone-methyl 230 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
18Ambrosia artemisiifoliaCommon Ragweed26266
10 United States (Michigan) United StatesMichigan1990 Corn (maize), and Nurseries atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
18Ambrosia artemisiifoliaCommon Ragweed5181
11 United States (New York) United StatesNew York1993 Corn (maize) atrazine, cyanazine, and simazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
18Ambrosia artemisiifoliaCommon Ragweed1057
12 United States (Indiana) United StatesIndiana1998 Soybean cloransulam-methyl, and imazethapyr 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1113
13 United States (Illinois) United StatesIllinois1998 Soybean cloransulam-methyl, and imazethapyr 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1114
14 United States (Michigan) United StatesMichigan1998 Corn (maize), Nurseries, and Soybean cloransulam-methyl, imazamox, and imazethapyr 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1115
15 United States (Minnesota) United StatesMinnesota1998 Soybean cloransulam-methyl, imazethapyr, and primisulfuron-methyl 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1116
16 United States (Ohio) United StatesOhio1998 Soybean chlorimuron-ethyl, cloransulam-methyl, halosulfuron-methyl, imazamox, imazaquin, primisulfuron-methyl, and prosulfuron 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1117
17 United States (Missouri) United StatesMissouri2004 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5228
18 United States (Arkansas) United StatesArkansas2004 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5261
19 United States (Delaware) United StatesDelaware2005 Soybean acifluorfen, carfentrazone-ethyl, chlorimuron-ethyl, cloransulam-methyl, flumiclorac-pentyl, flumioxazin, fomesafen, halosulfuron-methyl, imazamox, imazapyr, imazaquin, imazethapyr, iodosulfuron-methyl-Na, lactofen, metsulfuron-methyl, oxyfluorfen, primisulfuron-methyl, pyraflufen-ethyl, pyrithiobac-sodium, sulfentrazone, and trifloxysulfuron-Na 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
18Ambrosia artemisiifoliaCommon Ragweed5265
20 United States (Ohio) United StatesOhio2006 Soybean chlorimuron-ethyl, cloransulam-methyl, and glyphosate 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5406
21 United States (Ohio) United StatesOhio2006 Soybean chlorimuron-ethyl, cloransulam-methyl, fomesafen, and lactofen 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
18Ambrosia artemisiifoliaCommon Ragweed5407
22 United States (North Carolina) United StatesNorth Carolina2006 Cotton glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7819
23 United States (North Carolina) United StatesNorth Carolina2006 Peanut (groundnut) diclosulam 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed7857
24 United States (Kentucky) United StatesKentucky2006 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7879
25 United States (Kansas) United StatesKansas2007 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5305
26 United States (North Dakota) United StatesNorth Dakota2007 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5507
27 United States (Indiana) United StatesIndiana2007 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5519
28 United States (South Dakota) United StatesSouth Dakota2007 Corn (maize), and Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5635
29 United States (Minnesota) United StatesMinnesota2008 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5506
30 United States (Pennsylvania) United StatesPennsylvania2008 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7778
31 United States (Minnesota) United StatesMinnesota2010 Soybean cloransulam-methyl, glyphosate, and imazapyr 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7801
32 United States (Alabama) United StatesAlabama2013 Cotton glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7784
33 United States (New Jersey) United StatesNew Jersey2013 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed8916
34 United States (Nebraska) United StatesNebraska2013 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed8917
35 United States (Wisconsin) United StatesWisconsin2013 Soybean cloransulam-methyl 45 Inhibition of Acetolactate Synthase (B/2)
18Ambrosia artemisiifoliaCommon Ragweed10981
36 United States (Mississippi) United StatesMississippi2014 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed8900
37 United States (North Carolina) United StatesNorth Carolina2015 Corn (maize), and Soybean acifluorfen, cloransulam-methyl, fomesafen, glyphosate, lactofen, and nicosulfuron 45 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed13036
38 United States (Michigan) United StatesMichigan2016 Soybean cloransulam-methyl, and fomesafen 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
18Ambrosia artemisiifoliaCommon Ragweed17106
39 United States (Maryland) United StatesMaryland2016 Soybean cloransulam-methyl, fomesafen, and glyphosate 45 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed17109
40 United States (New Jersey) United StatesNew Jersey2016 Soybean cloransulam-methyl, fomesafen, and glyphosate 45 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed17110
41 United States (Wisconsin) United StatesWisconsin2017 Corn (maize), and Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
18Ambrosia artemisiifoliaCommon Ragweed17155
42 United States (Michigan) United StatesMichigan2022 Christmas Trees clopyralid 45 Auxin Mimics (O/4)
18Ambrosia artemisiifoliaCommon Ragweed27277
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