International Survey of Herbicide-Resistant Weeds

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Weeds Resistant to Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
by species and country
Weeds Resistant to Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
by species and country
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Weeds Resistant to Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
by species and country
#SpeciesCountryFirst Year
1 Amaranthus hybridus (syn: quitensis)
Smooth Pigweed
2013 - Argentina
2014 - Argentina *Multiple - 2 SOA's
2016 - Argentina *Multiple - 2 SOA's
2018 - Brazil *Multiple - 2 SOA's
201312Amaranthus hybridus (syn: quitensis)Smooth PigweedG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
2 Amaranthus palmeri
Palmer Amaranth
2005 - United States (Georgia)
2005 - United States (North Carolina)
2006 - United States (Arkansas)
2006 - United States (South Carolina)
2006 - United States (Tennessee)
2007 - United States (New Mexico)
2008 - United States (Alabama)
2008 - United States (Georgia) *Multiple - 2 SOA's
2008 - United States (Mississippi) *Multiple - 2 SOA's
2008 - United States (Missouri)
2009 - United States (Tennessee) *Multiple - 2 SOA's
2010 - United States (Georgia) *Multiple - 3 SOA's
2010 - United States (Illinois)
2010 - United States (Kentucky)
2010 - United States (Louisiana)
2010 - United States (Ohio)
2010 - United States (South Carolina) *Multiple - 2 SOA's
2011 - United States (Kansas)
2011 - United States (Michigan)
2011 - United States (Texas)
2011 - United States (Virginia)
2012 - United States (Arizona) *Multiple - 2 SOA's
2012 - United States (Delaware)
2012 - United States (Indiana)
2013 - United States (Florida)
2013 - United States (Florida) *Multiple - 2 SOA's
2013 - United States (Illinois) *Multiple - 2 SOA's
2013 - United States (Pennsylvania)
2013 - United States (Wisconsin)
2014 - United States (Delaware) *Multiple - 2 SOA's
2014 - United States (Maryland) *Multiple - 2 SOA's
2014 - United States (New Jersey)
2015 - Argentina
2015 - Brazil
2015 - United States (California)
2015 - United States (Kansas) *Multiple - 5 SOA's
2015 - United States (Tennessee) *Multiple - 2 SOA's
2016 - Brazil *Multiple - 2 SOA's
2016 - Mexico
2016 - United States (Arkansas) *Multiple - 5 SOA's
2016 - United States (Illinois) *Multiple - 2 SOA's
2016 - United States (Nebraska) *Multiple - 2 SOA's
2018 - United States (Oklahoma)
2019 - United States (Connecticut) *Multiple - 2 SOA's
2020 - United States (Tennessee) *Multiple - 2 SOA's
200514Amaranthus palmeriPalmer AmaranthG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
3 Amaranthus spinosus
Spiny Amaranth
2012 - United States (Mississippi)
2012278Amaranthus spinosusSpiny AmaranthG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
4 Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
2005 - United States (Missouri) *Multiple - 3 SOA's
2006 - United States (Illinois) *Multiple - 2 SOA's
2006 - United States (Kansas)
2006 - United States (Texas)
2007 - United States (Minnesota)
2007 - United States (Minnesota) *Multiple - 2 SOA's
2008 - United States (Ohio)
2009 - United States (Illinois) *Multiple - 4 SOA's
2009 - United States (Indiana)
2009 - United States (Iowa)
2009 - United States (Missouri) *Multiple - 2 SOA's
2010 - United States (Kentucky)
2010 - United States (Mississippi)
2010 - United States (North Dakota)
2010 - United States (South Dakota)
2011 - United States (Iowa) *Multiple - 4 SOA's
2011 - United States (Oklahoma)
2011 - United States (Tennessee)
2012 - United States (Nebraska)
2013 - United States (Wisconsin)
2014 - Canada (Ontario) *Multiple - 2 SOA's
2015 - United States (Arkansas)
2015 - United States (Louisiana)
2016 - United States (Minnesota) *Multiple - 2 SOA's
2016 - United States (Nebraska) *Multiple - 4 SOA's
2016 - United States (Wisconsin) *Multiple - 2 SOA's
2017 - Canada (Ontario) *Multiple - 4 SOA's
2017 - Canada (Ontario) *Multiple - 3 SOA's
2017 - Canada (Ontario) *Multiple - 2 SOA's
2020 - United States (North Carolina) *Multiple - 5 SOA's
2005219Amaranthus tuberculatus (=A. rudis)Tall WaterhempG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
5 Ambrosia artemisiifolia
Common Ragweed
2004 - United States (Arkansas)
2004 - United States (Missouri)
2006 - United States (Kentucky)
2006 - United States (North Carolina)
2006 - United States (Ohio) *Multiple - 2 SOA's
2007 - United States (Indiana)
2007 - United States (Kansas)
2007 - United States (North Dakota)
2007 - United States (South Dakota)
2008 - United States (Minnesota)
2008 - United States (Pennsylvania)
2010 - United States (Minnesota) *Multiple - 2 SOA's
2012 - Canada (Ontario) *Multiple - 2 SOA's
2013 - United States (Alabama)
2013 - United States (Nebraska)
2013 - United States (New Jersey)
2014 - United States (Mississippi)
2015 - United States (North Carolina) *Multiple - 3 SOA's
2016 - United States (Maryland) *Multiple - 3 SOA's
2016 - United States (New Jersey) *Multiple - 3 SOA's
2017 - United States (Wisconsin)
200418Ambrosia artemisiifoliaCommon RagweedG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
6 Ambrosia trifida
Giant Ragweed
2004 - United States (Ohio)
2005 - United States (Arkansas)
2005 - United States (Indiana)
2005 - United States (Kentucky)
2006 - United States (Kansas)
2006 - United States (Minnesota)
2006 - United States (Ohio) *Multiple - 2 SOA's
2007 - United States (Tennessee)
2008 - Canada (Ontario)
2008 - United States (Minnesota) *Multiple - 2 SOA's
2009 - United States (Iowa)
2009 - United States (Missouri)
2010 - United States (Mississippi)
2010 - United States (Nebraska)
2011 - Canada (Ontario) *Multiple - 2 SOA's
2011 - United States (Missouri) *Multiple - 2 SOA's
2011 - United States (Wisconsin)
2004184Ambrosia trifidaGiant RagweedG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
7 Arctotheca calendula
Capeweed
2020 - Australia (Western Australia) *Multiple - 3 SOA's
202021Arctotheca calendulaCapeweedG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
8 Avena fatua
Wild Oat
2018 - Australia (Queensland)
201828Avena fatuaWild OatG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
9 Avena sterilis ssp. ludoviciana
Sterile oat
2018 - Australia (New South Wales )
201830Avena sterilis ssp. ludovicianaSterile oatG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
10 Bidens pilosa
Hairy Beggarticks
2014 - Mexico
201432Bidens pilosaHairy BeggarticksG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
11 Bidens subalternans
Greater Beggarticks
2018 - Paraguay
2018194Bidens subalternansGreater BeggarticksG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
12 Brachiaria eruciformis
Sweet Summer Grass
2014 - Australia (Queensland)
2014318Brachiaria eruciformisSweet Summer GrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
13 Brassica rapa (=B. campestris)
Birdsrape Mustard
2012 - Argentina *Multiple - 2 SOA's
2017 - Canada (Quebec)
201236Brassica rapa (=B. campestris)Birdsrape MustardG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
14 Bromus catharticus
Rescuegrass
2017 - Argentina
2017338Bromus catharticusRescuegrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
15 Bromus diandrus
Ripgut Brome
2011 - Australia (South Australia)
2011197Bromus diandrusRipgut BromeG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
16 Bromus madritensis
Compact Brome
2018 - Spain
2018352Bromus madritensisCompact BromeG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
17 Bromus rubens
Red Brome
2014 - Australia (Western Australia)
2018 - Spain
2014324Bromus rubensRed BromeG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
18 Carduus acanthoides
Plumeless Thistle
2019 - Argentina *Multiple - 2 SOA's
2019348Carduus acanthoidesPlumeless ThistleG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
19 Chloris barbata = (C. inflate)
Swollen Fingergrass
2018 - Mexico
201853Chloris barbata = (C. inflate)Swollen FingergrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
20 Chloris elata
Tall Windmill Grass
2014 - Brazil
2014316Chloris elataTall Windmill GrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
21 Chloris radiata
Radiate Fingergrass
2019 - Colombia
2019 - Colombia *Multiple - 2 SOA's
2019340Chloris radiataRadiate FingergrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
22 Chloris truncata
Windmill Grass
2010 - Australia (New South Wales )
2015 - Australia (Victoria)
2010262Chloris truncataWindmill GrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
23 Chloris virgata
Feather Fingergrass
2015 - Australia (New South Wales )
2015 - Australia (Queensland)
2015 - Australia (South Australia)
2015330Chloris virgataFeather FingergrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
24 Conyza bonariensis
Hairy Fleabane
2003 - South Africa
2004 - Spain
2005 - Brazil
2005 - Israel
2006 - Colombia
2007 - United States (California)
2009 - United States (California) *Multiple - 2 SOA's
2010 - Australia (New South Wales )
2010 - Greece
2010 - Portugal
2011 - Australia (Queensland)
2011 - Australia (South Australia)
2012 - Argentina
200360Conyza bonariensisHairy FleabaneG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
25 Conyza canadensis
Horseweed
2000 - United States (Delaware)
2001 - United States (Kentucky)
2001 - United States (Tennessee)
2002 - United States (Indiana)
2002 - United States (Maryland)
2002 - United States (Missouri)
2002 - United States (New Jersey)
2002 - United States (Ohio)
2003 - United States (Arkansas)
2003 - United States (Mississippi)
2003 - United States (North Carolina)
2003 - United States (Ohio) *Multiple - 2 SOA's
2003 - United States (Pennsylvania)
2005 - Brazil
2005 - United States (California)
2005 - United States (Illinois)
2005 - United States (Kansas)
2005 - United States (Virginia)
2006 - China
2006 - Spain
2006 - United States (Nebraska)
2007 - Czech Republic
2007 - United States (Michigan)
2007 - United States (Mississippi) *Multiple - 2 SOA's
2007 - United States (West Virginia)
2009 - United States (Oklahoma)
2010 - Canada (Ontario)
2010 - Poland
2010 - United States (Delaware) *Multiple - 2 SOA's
2010 - United States (South Dakota)
2011 - Canada (Ontario) *Multiple - 2 SOA's
2011 - Italy
2011 - Portugal
2011 - United States (Iowa)
2012 - Greece
2013 - United States (Alabama)
2013 - United States (Wisconsin)
2014 - Japan
2014 - United States (California) *Multiple - 2 SOA's
2015 - United States (Montana)
2016 - Hungary
2017 - South Korea
2019 - France
200061Conyza canadensisHorseweedG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
26 Conyza sumatrensis
Sumatran Fleabane
2009 - Spain
2010 - Brazil
2010 - France
2011 - Brazil *Multiple - 2 SOA's
2012 - Greece
2016 - France *Multiple - 2 SOA's
2017 - Brazil *Multiple - 3 SOA's
2017 - Brazil *Multiple - 5 SOA's
2017 - Paraguay *Multiple - 3 SOA's
2018 - Australia (Queensland)
2019 - Turkey
200965Conyza sumatrensisSumatran FleabaneG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
27 Cynodon hirsutus
Gramilla mansa
2008 - Argentina
2008276Cynodon hirsutusGramilla mansaG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
28 Digitaria insularis
Sourgrass
2005 - Paraguay
2008 - Brazil
2014 - Argentina
2020 - Brazil *Multiple - 2 SOA's
2020 - Paraguay *Multiple - 2 SOA's
2005239Digitaria insularisSourgrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
29 Echinochloa colona
Junglerice
2007 - Australia (New South Wales )
2008 - United States (California)
2008 - Venezuela *Multiple - 2 SOA's
2009 - Argentina
2009 - Australia (Queensland)
2010 - Australia (Western Australia)
200778Echinochloa colonaJunglericeG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
30 Echinochloa crus-galli var. crus-galli
Barnyardgrass
2019 - Argentina
2020 - Brazil
201979Echinochloa crus-galli var. crus-galliBarnyardgrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
31 Eleusine indica
Goosegrass
1997 - Malaysia *Multiple - 2 SOA's
2006 - Colombia
2007 - Bolivia
2009 - Malaysia *Multiple - 4 SOA's
2010 - China
2010 - Costa Rica
2010 - United States (Mississippi)
2011 - United States (Tennessee)
2012 - Argentina
2012 - Indonesia *Multiple - 2 SOA's
2013 - Japan
2016 - Brazil
2016 - Colombia *Multiple - 2 SOA's
2016 - Mexico
2017 - Brazil *Multiple - 2 SOA's
2019 - Italy
199781Eleusine indicaGoosegrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
32 Euphorbia heterophylla
Wild Poinsettia
2019 - Brazil
201987Euphorbia heterophyllaWild PoinsettiaG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
33 Hedyotis verticillata
Woody borreria
2005 - Malaysia *Multiple - 2 SOA's
2005310Hedyotis verticillataWoody borreriaG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
34 Helianthus annuus
Common Sunflower
2015 - United States (Texas)
201595Helianthus annuusCommon SunflowerG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
35 Hordeum murinum ssp. glaucum
Smooth Barley
2016 - Australia (South Australia)
201697Hordeum murinum ssp. glaucumSmooth BarleyG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
36 Hordeum murinum ssp. leporinum
Hare Barley
2018 - Spain
201898Hordeum murinum ssp. leporinumHare BarleyG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
37 Kochia scoparia
Kochia
2007 - United States (Kansas)
2009 - United States (South Dakota)
2011 - United States (Nebraska)
2012 - Canada (Alberta) *Multiple - 2 SOA's
2012 - Canada (Saskatchewan) *Multiple - 2 SOA's
2012 - United States (Colorado)
2012 - United States (Montana)
2012 - United States (North Dakota)
2013 - United States (Kansas) *Multiple - 4 SOA's
2013 - United States (Kansas) *Multiple - 2 SOA's
2013 - United States (Montana) *Multiple - 2 SOA's
2013 - United States (Oklahoma)
2014 - Canada (Manitoba) *Multiple - 2 SOA's
2014 - United States (Idaho)
2014 - United States (Oregon)
2014 - United States (Wyoming)
2017 - Canada (Alberta) *Multiple - 3 SOA's
2007101Kochia scopariaKochiaG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
38 Lactuca saligna
Willow-leaved lettuce
2017 - Australia (Western Australia)
2017336Lactuca salignaWillow-leaved lettuceG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
39 Lactuca serriola
Prickly Lettuce
2015 - Australia (Victoria)
2015102Lactuca serriolaPrickly LettuceG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
40 Leptochloa virgata
Tropical Sprangletop (Juddsgrass)
2010 - Mexico
2010270Leptochloa virgataTropical Sprangletop (Juddsgrass)G129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
41 Lolium perenne
Perennial Ryegrass
2008 - Argentina
2012 - New Zealand
2013 - Portugal
2015 - New Zealand *Multiple - 3 SOA's
2008111Lolium perennePerennial RyegrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
42 Lolium perenne ssp. multiflorum
Italian Ryegrass
2001 - Chile
2002 - Chile *Multiple - 2 SOA's
2003 - Brazil
2004 - United States (Oregon)
2005 - United States (Mississippi)
2006 - Chile *Multiple - 2 SOA's
2006 - Spain
2007 - Argentina
2007 - Chile *Multiple - 3 SOA's
2008 - Italy *Multiple - 2 SOA's
2008 - United States (Arkansas)
2008 - United States (California)
2009 - United States (North Carolina)
2010 - Argentina *Multiple - 2 SOA's
2010 - Brazil *Multiple - 2 SOA's
2010 - United States (Oregon) *Multiple - 2 SOA's
2011 - Japan
2011 - Switzerland
2012 - Italy *Multiple - 2 SOA's
2012 - New Zealand
2012 - United States (Tennessee)
2014 - United States (Louisiana)
2015 - New Zealand *Multiple - 3 SOA's
2015 - United States (California) *Multiple - 3 SOA's
2016 - United States (California) *Multiple - 4 SOA's
2017 - Brazil *Multiple - 2 SOA's
2001110Lolium perenne ssp. multiflorumItalian RyegrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
43 Lolium rigidum
Rigid Ryegrass
1996 - Australia (Victoria)
1997 - Australia (New South Wales )
1998 - United States (California)
1999 - Australia (South Australia)
1999 - Australia (Victoria) *Multiple - 4 SOA's
2001 - South Africa
2003 - Australia (Western Australia)
2003 - South Africa *Multiple - 3 SOA's
2005 - France
2006 - Spain
2007 - Israel *Multiple - 3 SOA's
2007 - Italy
2008 - Australia (South Australia) *Multiple - 2 SOA's
2010 - Australia (South Australia) *Multiple - 5 SOA's
2013 - Australia (Western Australia) *Multiple - 2 SOA's
2016 - Greece
2016 - Spain *Multiple - 2 SOA's
1996112Lolium rigidumRigid RyegrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
44 Parthenium hysterophorus
Ragweed Parthenium
2004 - Colombia
2014 - United States (Florida)
2017 - Mexico
2004124Parthenium hysterophorusRagweed PartheniumG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
45 Paspalum paniculatum
Arrocillo
2010 - Costa Rica
2010335Paspalum paniculatumArrocilloG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
46 Plantago lanceolata
Buckhorn Plantain
2003 - South Africa
2003220Plantago lanceolataBuckhorn PlantainG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
47 Poa annua
Annual Bluegrass
2010 - United States (Missouri)
2011 - United States (Tennessee)
2013 - United States (California)
2017 - Australia (New South Wales )
2017 - Australia (New South Wales ) *Multiple - 5 SOA's
2017 - Australia (South Australia)
2017 - Australia (Victoria)
2010130Poa annuaAnnual BluegrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
48 Raphanus raphanistrum
Wild Radish
2010 - Australia (Western Australia) *Multiple - 4 SOA's
2010141Raphanus raphanistrumWild RadishG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
49 Salsola tragus
Russian-thistle
2015 - United States (Montana)
2015 - United States (Washington)
2016 - United States (Oregon)
2019 - Argentina
2015147Salsola tragusRussian-thistleG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
50 Sonchus oleraceus
Annual Sowthistle
2014 - Australia (New South Wales )
2014164Sonchus oleraceusAnnual SowthistleG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
51 Sorghum halepense
Johnsongrass
2005 - Argentina
2007 - United States (Arkansas)
2008 - United States (Mississippi)
2010 - United States (Louisiana)
2015 - Argentina *Multiple - 2 SOA's
2019 - Australia (Queensland)
2005166Sorghum halepenseJohnsongrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
52 Tridax procumbens
Coat Buttons
2016 - Australia (Western Australia)
2016333Tridax procumbensCoat ButtonsG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
53 Urochloa panicoides
Liverseedgrass
2008 - Australia (New South Wales )
2017 - Argentina
2008171Urochloa panicoidesLiverseedgrassG129Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
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