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 Photosystem II inhibitors (C1/5)
18Ambrosia artemisiifoliaCommon Ragweed59
2 Canada (Quebec) CanadaQuebec1999 Carrots linuron 7 PSII inhibitor (Ureas and amides) (C2/7)
18Ambrosia artemisiifoliaCommon Ragweed5064
3 Canada (Quebec) CanadaQuebec1999 Carrots linuron, and metribuzin 7 Multiple Resistance: 2 Sites of Action
Photosystem II inhibitors (C1/5)
PSII inhibitor (Ureas and amides) (C2/7)
18Ambrosia artemisiifoliaCommon Ragweed17128
4 Canada (Ontario) CanadaOntario2000 Soybean chlorimuron-ethyl, cloransulam-methyl, and imazethapyr 7 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed5471
5 Canada (Quebec) CanadaQuebec2007 Soybean cloransulam-methyl, and imazethapyr 7 ALS inhibitors (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
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5713
7 United States (Michigan) United StatesMichigan1990 Corn (maize), and Nurseries atrazine 45 Photosystem II inhibitors (C1/5)
18Ambrosia artemisiifoliaCommon Ragweed5181
8 United States (New York) United StatesNew York1993 Corn (maize) atrazine, cyanazine, and simazine 45 Photosystem II inhibitors (C1/5)
18Ambrosia artemisiifoliaCommon Ragweed1057
9 United States (Indiana) United StatesIndiana1998 Soybean cloransulam-methyl, and imazethapyr 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1113
10 United States (Illinois) United StatesIllinois1998 Soybean cloransulam-methyl, and imazethapyr 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1114
11 United States (Michigan) United StatesMichigan1998 Corn (maize), Nurseries, and Soybean cloransulam-methyl, imazamox, and imazethapyr 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1115
12 United States (Minnesota) United StatesMinnesota1998 Soybean cloransulam-methyl, imazethapyr, and primisulfuron-methyl 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1116
13 United States (Ohio) United StatesOhio1998 Soybean chlorimuron-ethyl, cloransulam-methyl, halosulfuron-methyl, imazamox, imazaquin, primisulfuron-methyl, and prosulfuron 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed1117
14 United States (Missouri) United StatesMissouri2004 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5228
15 United States (Arkansas) United StatesArkansas2004 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5261
16 United States (Delaware) United StatesDelaware2005 Soybean acifluorfen-sodium, carfentrazone-ethyl, chlorimuron-ethyl, cloransulam-methyl, flumiclorac-pentyl, flumioxazin, fomesafen, halosulfuron-methyl, imazamox, imazapyr, imazaquin, imazethapyr, iodosulfuron-methyl-sodium, lactofen, metsulfuron-methyl, oxyfluorfen, primisulfuron-methyl, pyraflufen-ethyl, pyrithiobac-sodium, sulfentrazone, and trifloxysulfuron-sodium 45 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
18Ambrosia artemisiifoliaCommon Ragweed5265
17 United States (Ohio) United StatesOhio2006 Soybean chlorimuron-ethyl, cloransulam-methyl, and glyphosate 45 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5406
18 United States (Ohio) United StatesOhio2006 Soybean chlorimuron-ethyl, cloransulam-methyl, fomesafen, and lactofen 45 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
18Ambrosia artemisiifoliaCommon Ragweed5407
19 United States (North Carolina) United StatesNorth Carolina2006 Cotton glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7819
20 United States (North Carolina) United StatesNorth Carolina2006 Peanut (groundnut) diclosulam 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed7857
21 United States (Kentucky) United StatesKentucky2006 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7879
22 United States (Kansas) United StatesKansas2007 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5305
23 United States (North Dakota) United StatesNorth Dakota2007 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5507
24 United States (Indiana) United StatesIndiana2007 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5519
25 United States (South Dakota) United StatesSouth Dakota2007 Corn (maize), and Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5635
26 United States (Minnesota) United StatesMinnesota2008 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed5506
27 United States (Pennsylvania) United StatesPennsylvania2008 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7778
28 United States (Minnesota) United StatesMinnesota2010 Soybean cloransulam-methyl, glyphosate, and imazapyr 45 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7801
29 United States (Alabama) United StatesAlabama2013 Cotton glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed7784
30 United States (New Jersey) United StatesNew Jersey2013 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed8916
31 United States (Nebraska) United StatesNebraska2013 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed8917
32 United States (Wisconsin) United StatesWisconsin2013 Soybean cloransulam-methyl 45 ALS inhibitors (B/2)
18Ambrosia artemisiifoliaCommon Ragweed10981
33 United States (Mississippi) United StatesMississippi2014 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed8900
34 United States (North Carolina) United StatesNorth Carolina2015 Corn (maize), and Soybean acifluorfen-sodium, cloransulam-methyl, fomesafen, glyphosate, lactofen, and nicosulfuron 45 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed13036
35 United States (Michigan) United StatesMichigan2016 Soybean cloransulam-methyl, and fomesafen 45 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
18Ambrosia artemisiifoliaCommon Ragweed17106
36 United States (Maryland) United StatesMaryland2016 Soybean cloransulam-methyl, fomesafen, and glyphosate 45 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed17109
37 United States (New Jersey) United StatesNew Jersey2016 Soybean cloransulam-methyl, fomesafen, and glyphosate 45 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
18Ambrosia artemisiifoliaCommon Ragweed17110
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, November 21, 2018 .  Available  www.weedscience.org
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