INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Weeds Resistant to Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
by species and country
Weeds Resistant to Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
by species and country
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Weeds Resistant to Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
by species and country
#SpeciesCountryFirst Year
1 Alopecurus aequalis
Shortawn Foxtail
2010 - China
2014 - China *Multiple - 2 SOA's
2010264Alopecurus aequalisShortawn FoxtailA21Inhibition of Acetyl CoA Carboxylase
2 Alopecurus japonicus
Japanese Foxtail
2007 - China
2014 - China *Multiple - 2 SOA's
20075Alopecurus japonicusJapanese FoxtailA21Inhibition of Acetyl CoA Carboxylase
3 Alopecurus myosuroides
Blackgrass
1982 - United Kingdom
1983 - Germany *Multiple - 2 SOA's
1993 - France
1996 - Belgium
1996 - Belgium *Multiple - 4 SOA's
1996 - Netherlands *Multiple - 2 SOA's
1999 - Netherlands *Multiple - 2 SOA's
2001 - Denmark
2001 - Denmark *Multiple - 3 SOA's
2001 - Turkey
2003 - France *Multiple - 2 SOA's
2003 - Germany
2007 - Germany *Multiple - 4 SOA's
2008 - Turkey *Multiple - 2 SOA's
2009 - Germany *Multiple - 2 SOA's
2009 - Italy
2011 - Poland
2011 - Sweden
2011 - Sweden *Multiple - 3 SOA's
2012 - Poland *Multiple - 2 SOA's
2014 - Sweden *Multiple - 2 SOA's
2015 - Spain *Multiple - 3 SOA's
2019 - Switzerland *Multiple - 3 SOA's
2021 - Ireland *Multiple - 2 SOA's
19826Alopecurus myosuroidesBlackgrassA21Inhibition of Acetyl CoA Carboxylase
4 Apera spica-venti
Silky Windgrass
2009 - Germany *Multiple - 3 SOA's
2010 - Poland
2011 - Poland *Multiple - 2 SOA's
2016 - Denmark *Multiple - 2 SOA's
200920Apera spica-ventiSilky WindgrassA21Inhibition of Acetyl CoA Carboxylase
5 Avena fatua
Wild Oat
1985 - Australia (Western Australia)
1986 - South Africa *Multiple - 2 SOA's
1988 - Australia (South Australia)
1990 - Canada (Manitoba)
1990 - Canada (Saskatchewan)
1990 - United States (Oregon)
1991 - Australia (New South Wales )
1991 - Canada (Alberta)
1991 - United States (Minnesota)
1991 - United States (North Dakota)
1991 - United States (Washington)
1992 - United States (Idaho)
1994 - Canada (Manitoba) *Multiple - 3 SOA's
1994 - United Kingdom *Multiple - 3 SOA's
1996 - Belgium
1996 - Canada (Saskatchewan) *Multiple - 3 SOA's
1996 - France
1997 - Canada (Manitoba) *Multiple - 4 SOA's
1997 - United States (Colorado)
1998 - Canada (Alberta) *Multiple - 3 SOA's
1998 - Chile
1998 - Mexico
2002 - United States (Montana)
2004 - Poland
2006 - Australia (New South Wales ) *Multiple - 3 SOA's
2007 - Iran
2009 - Germany *Multiple - 2 SOA's
2009 - United States (South Dakota)
2010 - Argentina
2010 - Brazil
2011 - Poland *Multiple - 2 SOA's
2011 - Turkey
2012 - Canada (Quebec)
2012 - Germany
2012 - United States (South Dakota) *Multiple - 2 SOA's
2014 - New Zealand
2015 - Canada (Manitoba) *Multiple - 4 SOA's
2015 - Syria
2019 - Ireland
2024 - Pakistan
198528Avena fatuaWild OatA21Inhibition of Acetyl CoA Carboxylase
6 Avena sterilis
Sterile Oat
1989 - Australia (New South Wales )
1989 - Australia (South Australia)
1992 - Italy
1993 - United Kingdom *Multiple - 3 SOA's
1997 - Turkey
2004 - Italy *Multiple - 2 SOA's
2006 - Israel
2008 - Iran
2008 - Turkey *Multiple - 2 SOA's
2009 - Greece
2010 - Cyprus
2023 - Spain
198929Avena sterilisSterile OatA21Inhibition of Acetyl CoA Carboxylase
7 Avena sterilis ssp. ludoviciana
Sterile oat
1996 - France
2006 - Australia (Queensland)
2006 - Iran
2010 - Iran *Multiple - 2 SOA's
199630Avena sterilis ssp. ludovicianaSterile oatA21Inhibition of Acetyl CoA Carboxylase
8 Beckmannia syzigachne
American Sloughgrass
2010 - China
201031Beckmannia syzigachneAmerican SloughgrassA21Inhibition of Acetyl CoA Carboxylase
9 Brachypodium distachyon
Annual Falsebrome
2014 - Israel
201435Brachypodium distachyonAnnual FalsebromeA21Inhibition of Acetyl CoA Carboxylase
10 Bromus diandrus
Ripgut Brome
1999 - Australia (Victoria)
2020 - Australia (Western Australia)
1999197Bromus diandrusRipgut BromeA21Inhibition of Acetyl CoA Carboxylase
11 Bromus diandrus ssp. rigidus (=B. rigidus)
Rigid Brome
2005 - Australia (Western Australia)
2007 - Australia (South Australia)
200538Bromus diandrus ssp. rigidus (=B. rigidus)Rigid BromeA21Inhibition of Acetyl CoA Carboxylase
12 Bromus sterilis
Poverty Brome
2012 - Germany
2012289Bromus sterilisPoverty BromeA21Inhibition of Acetyl CoA Carboxylase
13 Bromus tectorum
Downy Brome (Cheatgrass)
2005 - United States (Oregon)
200540Bromus tectorumDowny Brome (Cheatgrass)A21Inhibition of Acetyl CoA Carboxylase
14 Chloris virgata
Feather Fingergrass
2023 - Argentina
2023330Chloris virgataFeather FingergrassA21Inhibition of Acetyl CoA Carboxylase
15 Cynosurus echinatus
Hedgehog Dogtailgrass
1999 - Chile
2004 - Chile *Multiple - 2 SOA's
1999205Cynosurus echinatusHedgehog DogtailgrassA21Inhibition of Acetyl CoA Carboxylase
16 Cyperus iria
Rice Flatsedge
2024 - Dominican Republic *Multiple - 3 SOA's
2024266Cyperus iriaRice FlatsedgeA21Inhibition of Acetyl CoA Carboxylase
17 Digitaria ciliaris
Southern Crabgrass
2002 - Brazil
2021 - China
2002225Digitaria ciliarisSouthern CrabgrassA21Inhibition of Acetyl CoA Carboxylase
18 Digitaria insularis
Sourgrass
2015 - Bolivia *Multiple - 2 SOA's
2016 - Brazil
2020 - Brazil *Multiple - 2 SOA's
2020 - Paraguay *Multiple - 2 SOA's
2015239Digitaria insularisSourgrassA21Inhibition of Acetyl CoA Carboxylase
19 Digitaria ischaemum
Smooth Crabgrass
1996 - United States (New Jersey)
1996177Digitaria ischaemumSmooth CrabgrassA21Inhibition of Acetyl CoA Carboxylase
20 Digitaria nuda
Naked Crabgrass
2021 - Brazil
20213358Digitaria nudaNaked CrabgrassA21Inhibition of Acetyl CoA Carboxylase
21 Digitaria sanguinalis
Large Crabgrass
1992 - United States (Wisconsin)
1993 - Australia (South Australia) *Multiple - 2 SOA's
2005 - France
2006 - Italy
2008 - United States (Georgia)
2011 - Canada (Ontario)
2011 - China
2024 - Dominican Republic
199277Digitaria sanguinalisLarge CrabgrassA21Inhibition of Acetyl CoA Carboxylase
22 Echinochloa colona
Junglerice
1994 - Costa Rica
1998 - Costa Rica *Multiple - 3 SOA's
2000 - Nicaragua
2006 - Bolivia
2008 - Venezuela *Multiple - 2 SOA's
2010 - Venezuela *Multiple - 3 SOA's
2013 - Costa Rica *Multiple - 2 SOA's
2016 - Colombia *Multiple - 3 SOA's
2024 - Dominican Republic *Multiple - 2 SOA's
199478Echinochloa colonaJunglericeA21Inhibition of Acetyl CoA Carboxylase
23 Echinochloa crus-galli var. crus-galli
Barnyardgrass
2000 - United States (California) *Multiple - 2 SOA's
2001 - Thailand
2008 - South Korea *Multiple - 2 SOA's
2009 - Egypt
2009 - Italy *Multiple - 2 SOA's
2009 - Turkey *Multiple - 2 SOA's
2010 - China
2010 - Japan
2011 - Italy
2011 - United States (Mississippi) *Multiple - 4 SOA's
2015 - Brazil *Multiple - 3 SOA's
2021 - Australia (New South Wales )
2024 - Dominican Republic *Multiple - 3 SOA's
200079Echinochloa crus-galli var. crus-galliBarnyardgrassA21Inhibition of Acetyl CoA Carboxylase
24 Echinochloa crus-galli var. formosensis
Taiwan barnyardgrass
2009 - Japan
2010 - Japan *Multiple - 2 SOA's
2009304Echinochloa crus-galli var. formosensisTaiwan barnyardgrassA21Inhibition of Acetyl CoA Carboxylase
25 Echinochloa oryzoides
Early Watergrass
2009 - Turkey *Multiple - 2 SOA's
2009261Echinochloa oryzoidesEarly WatergrassA21Inhibition of Acetyl CoA Carboxylase
26 Echinochloa phyllopogon (=E. oryzicola)
Late Watergrass
1998 - United States (California)
2000 - United States (California) *Multiple - 2 SOA's
2006 - South Korea *Multiple - 2 SOA's
2020 - Portugal
2020 - Portugal *Multiple - 2 SOA's
1998178Echinochloa phyllopogon (=E. oryzicola)Late WatergrassA21Inhibition of Acetyl CoA Carboxylase
27 Ehrharta longiflora
Longflowered veldtgrass
2014 - Australia (Western Australia)
2014315Ehrharta longifloraLongflowered veldtgrass A21Inhibition of Acetyl CoA Carboxylase
28 Eleusine indica
Goosegrass
1990 - Malaysia
1997 - Malaysia *Multiple - 2 SOA's
2003 - Brazil
2005 - Bolivia
2009 - Malaysia *Multiple - 4 SOA's
2014 - Argentina
2017 - Brazil *Multiple - 2 SOA's
2019 - Argentina *Multiple - 2 SOA's
2022 - United States (North Carolina) *Multiple - 2 SOA's
199081Eleusine indicaGoosegrassA21Inhibition of Acetyl CoA Carboxylase
29 Eriochloa punctata
Pasto Amargo
1997 - Bolivia
1997176Eriochloa punctataPasto AmargoA21Inhibition of Acetyl CoA Carboxylase
30 Hordeum jubatum
Foxtail Barley
2022 - Canada (Alberta)
2022358Hordeum jubatumFoxtail BarleyA21Inhibition of Acetyl CoA Carboxylase
31 Hordeum murinum ssp. glaucum
Smooth Barley
2000 - Australia (South Australia)
200097Hordeum murinum ssp. glaucumSmooth BarleyA21Inhibition of Acetyl CoA Carboxylase
32 Hordeum murinum ssp. leporinum
Hare Barley
1996 - Australia (South Australia)
2001 - Australia (New South Wales )
199698Hordeum murinum ssp. leporinumHare BarleyA21Inhibition of Acetyl CoA Carboxylase
33 Ischaemum rugosum
Saramollagrass
2000 - Colombia
2004 - Venezuela *Multiple - 3 SOA's
2024 - Dominican Republic *Multiple - 3 SOA's
200099Ischaemum rugosumSaramollagrassA21Inhibition of Acetyl CoA Carboxylase
34 Leptochloa chinensis
Chinese Sprangletop
2002 - Thailand
2011 - China
2012 - South Korea
2002223Leptochloa chinensisChinese SprangletopA21Inhibition of Acetyl CoA Carboxylase
35 Leptochloa panicoides
Amazon Sprangletop
2009 - United States (Louisiana)
2009267Leptochloa panicoidesAmazon SprangletopA21Inhibition of Acetyl CoA Carboxylase
36 Lolium perenne
Perennial Ryegrass
2001 - Chile
2008 - Germany *Multiple - 2 SOA's
2016 - Denmark *Multiple - 2 SOA's
2001111Lolium perennePerennial RyegrassA21Inhibition of Acetyl CoA Carboxylase
37 Lolium perenne ssp. multiflorum
Italian Ryegrass
1987 - United States (Oregon)
1990 - United Kingdom
1990 - United States (North Carolina)
1990 - United States (South Carolina)
1991 - United States (Idaho)
1993 - France
1993 - United States (Virginia)
1995 - Italy
1995 - United States (Arkansas) *Multiple - 2 SOA's
1995 - United States (Georgia)
1998 - Chile
1998 - United States (Maryland)
2002 - Italy *Multiple - 2 SOA's
2003 - France *Multiple - 2 SOA's
2004 - United States (Kentucky)
2005 - Chile *Multiple - 2 SOA's
2005 - United States (Arkansas)
2005 - United States (Idaho) *Multiple - 3 SOA's
2006 - Chile *Multiple - 2 SOA's
2006 - United States (Tennessee)
2007 - Chile *Multiple - 3 SOA's
2007 - United States (North Carolina) *Multiple - 2 SOA's
2008 - Italy *Multiple - 2 SOA's
2009 - Argentina
2009 - United States (Georgia) *Multiple - 2 SOA's
2010 - Argentina *Multiple - 3 SOA's
2010 - Brazil *Multiple - 2 SOA's
2010 - Denmark *Multiple - 2 SOA's
2010 - United States (South Carolina) *Multiple - 2 SOA's
2013 - United States (Missouri) *Multiple - 2 SOA's
2014 - New Zealand
2015 - United States (California) *Multiple - 3 SOA's
2016 - Brazil *Multiple - 2 SOA's
2016 - United States (California) *Multiple - 4 SOA's
2017 - United States (Oklahoma)
2018 - Switzerland *Multiple - 2 SOA's
2020 - Switzerland *Multiple - 3 SOA's
2021 - Ireland *Multiple - 2 SOA's
2022 - China *Multiple - 2 SOA's
2022 - United States (North Carolina) *Multiple - 4 SOA's
1987110Lolium perenne ssp. multiflorumItalian RyegrassA21Inhibition of Acetyl CoA Carboxylase
38 Lolium persicum
Persian Darnel
1993 - United States (Montana)
2004 - Canada (Saskatchewan)
2009 - Canada (Alberta)
1993181Lolium persicumPersian DarnelA21Inhibition of Acetyl CoA Carboxylase
39 Lolium rigidum
Rigid Ryegrass
1982 - Australia (South Australia) *Multiple - 6 SOA's
1982 - Australia (Western Australia) *Multiple - 3 SOA's
1984 - Australia (Victoria) *Multiple - 3 SOA's
1985 - Australia (New South Wales ) *Multiple - 3 SOA's
1992 - Saudi Arabia
1992 - Spain *Multiple - 2 SOA's
1992 - Spain
1993 - France
1993 - South Africa *Multiple - 2 SOA's
1996 - Tunisia
1997 - Chile
1997 - Greece
1998 - Israel
1999 - Australia (Victoria) *Multiple - 4 SOA's
2003 - Chile *Multiple - 2 SOA's
2003 - South Africa *Multiple - 3 SOA's
2007 - Iran
2007 - Israel *Multiple - 3 SOA's
2010 - Australia (South Australia) *Multiple - 2 SOA's
2010 - Australia (South Australia) *Multiple - 5 SOA's
2013 - Israel *Multiple - 2 SOA's
2015 - Spain *Multiple - 2 SOA's
2023 - Algeria
2023 - Algeria *Multiple - 2 SOA's
2023 - Morocco
2023 - Morocco *Multiple - 2 SOA's
2023 - Tunisia *Multiple - 2 SOA's
1982112Lolium rigidumRigid RyegrassA21Inhibition of Acetyl CoA Carboxylase
40 Oryza sativa var. sylvatica
Red Rice
2024 - Dominican Republic *Multiple - 3 SOA's
2025 - Brazil *Multiple - 2 SOA's
2024242Oryza sativa var. sylvaticaRed RiceA21Inhibition of Acetyl CoA Carboxylase
41 Phalaris brachystachys
Shortspike Canarygrass
2001 - Italy
2008 - Turkey *Multiple - 2 SOA's
2014 - Iran
2015 - Syria
2001244Phalaris brachystachysShortspike CanarygrassA21Inhibition of Acetyl CoA Carboxylase
42 Phalaris minor
Little seed Canary grass
1993 - Israel
1994 - India
1996 - Mexico
1999 - South Africa *Multiple - 2 SOA's
2001 - United States (California)
2004 - Iran
2006 - India *Multiple - 3 SOA's
2012 - Australia (Victoria)
2015 - Pakistan
1993127Phalaris minorLittle seed Canary grassA21Inhibition of Acetyl CoA Carboxylase
43 Phalaris paradoxa
Hood Canarygrass
1996 - Mexico
1997 - Australia (New South Wales )
1998 - Italy
2004 - Israel
2007 - Iran
2012 - Australia (New South Wales ) *Multiple - 2 SOA's
2015 - Syria
1996128Phalaris paradoxaHood CanarygrassA21Inhibition of Acetyl CoA Carboxylase
44 Poa annua
Annual Bluegrass
2017 - Australia (New South Wales )
2017 - Australia (Victoria)
2020 - New Zealand
2021 - Ireland *Multiple - 2 SOA's
2025 - United States (Oregon)
2017130Poa annuaAnnual BluegrassA21Inhibition of Acetyl CoA Carboxylase
45 Polypogon fugax
Asia Minor bluegrass
2014 - China
2014313Polypogon fugaxAsia Minor bluegrassA21Inhibition of Acetyl CoA Carboxylase
46 Rottboellia cochinchinensis (=R. exaltata)
Itchgrass
1997 - United States (Louisiana)
1997265Rottboellia cochinchinensis (=R. exaltata)ItchgrassA21Inhibition of Acetyl CoA Carboxylase
47 Sclerochloa kengiana
Keng Stiffgrass
2010 - China
2010297Sclerochloa kengianaKeng StiffgrassA21Inhibition of Acetyl CoA Carboxylase
48 Setaria faberi
Giant Foxtail
1991 - United States (Wisconsin)
1994 - United States (Iowa)
1998 - United States (Illinois)
1991149Setaria faberiGiant FoxtailA21Inhibition of Acetyl CoA Carboxylase
49 Setaria viridis
Green Foxtail
1991 - Canada (Manitoba)
1992 - Canada (Manitoba) *Multiple - 2 SOA's
1996 - Canada (Alberta)
1996 - Canada (Saskatchewan)
1996 - Canada (Saskatchewan) *Multiple - 2 SOA's
2005 - United States (Montana)
1991153Setaria viridisGreen FoxtailA21Inhibition of Acetyl CoA Carboxylase
50 Setaria viridis var. major (=var. robusta-alba, var. robustapurpurea)
Giant Green Foxtail
1999 - United States (Minnesota)
1999 - United States (Minnesota)
1999155Setaria viridis var. major (=var. robusta-alba, var. robustapurpurea)Giant Green FoxtailA21Inhibition of Acetyl CoA Carboxylase
51 Snowdenia polystachya
Ethiopian grass
1998 - Ethiopia
1998195Snowdenia polystachyaEthiopian grassA21Inhibition of Acetyl CoA Carboxylase
52 Sorghum bicolor
Shattercane
2014 - Bolivia *Multiple - 2 SOA's
2014165Sorghum bicolorShattercaneA21Inhibition of Acetyl CoA Carboxylase
53 Sorghum bicolor ssp. drummondii (=Sorghum sudanese)
Sudangrass
1999 - Bolivia
1999187Sorghum bicolor ssp. drummondii (=Sorghum sudanese)SudangrassA21Inhibition of Acetyl CoA Carboxylase
54 Sorghum halepense
Johnsongrass
1991 - United States (Kentucky)
1991 - United States (Mississippi)
1995 - United States (Tennessee)
1995 - United States (Virginia)
1997 - United States (Louisiana)
2005 - Greece
2005 - Italy
2006 - Israel
2015 - Argentina
2015 - Argentina *Multiple - 2 SOA's
2017 - Serbia
2018 - Serbia *Multiple - 2 SOA's
1991166Sorghum halepenseJohnsongrassA21Inhibition of Acetyl CoA Carboxylase
55 Urochloa plantaginea (=Brachiaria plantaginea)
Alexandergrass
1997 - Brazil
199734Urochloa plantaginea (=Brachiaria plantaginea)AlexandergrassA21Inhibition of Acetyl CoA Carboxylase
56 Zea mays ssp. mexicana
Mexican teosinte
2020 - France
2020354Zea mays ssp. mexicanaMexican teosinteA21Inhibition of Acetyl CoA Carboxylase

HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Friday, October 16, 2026.  Available at  www.weedscience.org

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