International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Weeds Resistant to EPSP synthase inhibitors (G/9)
by species and country
#SpeciesCountryFirst Year
1 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)
200514Amaranthus palmeriPalmer AmaranthG129EPSP synthase inhibitors
2 Amaranthus quitensis
Mucronate Pigweed
2013 - Argentina
2013201Amaranthus quitensisMucronate PigweedG129EPSP synthase inhibitors
3 Amaranthus spinosus
Spiny Amaranth
2012 - United States (Mississippi)
2012278Amaranthus spinosusSpiny AmaranthG129EPSP synthase inhibitors
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)
2005219Amaranthus tuberculatus (=A. rudis)Tall WaterhempG129EPSP synthase inhibitors
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)
200418Ambrosia artemisiifoliaCommon RagweedG129EPSP synthase inhibitors
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 RagweedG129EPSP synthase inhibitors
7 Bromus diandrus
Ripgut Brome
2011 - Australia (South Australia)
2011197Bromus diandrusRipgut BromeG129EPSP synthase inhibitors
8 Chloris truncata
Windmill Grass
2010 - Australia (New South Wales )
2010262Chloris truncataWindmill GrassG129EPSP synthase inhibitors
9 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)
200360Conyza bonariensisHairy FleabaneG129EPSP synthase inhibitors
10 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)
200061Conyza canadensisHorseweedG129EPSP synthase inhibitors
11 Conyza sumatrensis
Sumatran Fleabane
2009 - Spain
2010 - Brazil
2011 - Brazil *Multiple - 2 SOA's
2012 - Greece
200965Conyza sumatrensisSumatran FleabaneG129EPSP synthase inhibitors
12 Cynodon hirsutus
Gramilla mansa
2008 - Argentina
2008276Cynodon hirsutusGramilla mansaG129EPSP synthase inhibitors
13 Digitaria insularis
Sourgrass
2005 - Paraguay
2008 - Brazil
2005239Digitaria insularisSourgrassG129EPSP synthase inhibitors
14 Echinochloa colona
Junglerice
2007 - Australia (New South Wales )
2008 - United States (California)
2009 - Argentina
2009 - Australia (Queensland)
2010 - Australia (Western Australia)
200778Echinochloa colonaJunglericeG129EPSP synthase inhibitors
15 Eleusine indica
Goosegrass
1997 - Malaysia *Multiple - 2 SOA's
2006 - Colombia
2007 - Bolivia
2010 - China
2010 - Costa Rica
2010 - United States (Mississippi)
2011 - United States (Tennessee)
2012 - Argentina
199781Eleusine indicaGoosegrassG129EPSP synthase inhibitors
16 Hedyotis verticillata
Woody borreria
2005 - Malaysia *Multiple - 2 SOA's
2005310Hedyotis verticillataWoody borreriaG129EPSP synthase inhibitors
17 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 (Montana) *Multiple - 2 SOA's
2013 - United States (Oklahoma)
2007101Kochia scopariaKochiaG129EPSP synthase inhibitors
18 Leptochloa virgata
Tropical Sprangletop (Juddsgrass)
2010 - Mexico
2010270Leptochloa virgataTropical Sprangletop (Juddsgrass)G129EPSP synthase inhibitors
19 Lolium perenne
Perennial Ryegrass
2008 - Argentina
2012 - New Zealand
2013 - Portugal
2008111Lolium perennePerennial RyegrassG129EPSP synthase inhibitors
20 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 - 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
2012 - New Zealand
2012 - United States (Tennessee)
2014 - United States (Louisiana)
2001110Lolium perenne ssp. multiflorumItalian RyegrassG129EPSP synthase inhibitors
21 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
1996112Lolium rigidumRigid RyegrassG129EPSP synthase inhibitors
22 Parthenium hysterophorus
Ragweed Parthenium
2004 - Colombia
2004124Parthenium hysterophorusRagweed PartheniumG129EPSP synthase inhibitors
23 Plantago lanceolata
Buckhorn Plantain
2003 - South Africa
2003220Plantago lanceolataBuckhorn PlantainG129EPSP synthase inhibitors
24 Poa annua
Annual Bluegrass
2010 - United States (Missouri)
2011 - United States (Tennessee)
2013 - United States (California)
2010130Poa annuaAnnual BluegrassG129EPSP synthase inhibitors
25 Raphanus raphanistrum
Wild Radish
2010 - Australia (Western Australia) *Multiple - 4 SOA's
2010141Raphanus raphanistrumWild RadishG129EPSP synthase inhibitors
26 Sonchus oleraceus
Annual Sowthistle
2014 - Australia (New South Wales )
2014164Sonchus oleraceusAnnual SowthistleG129EPSP synthase inhibitors
27 Sorghum halepense
Johnsongrass
2005 - Argentina
2007 - United States (Arkansas)
2008 - United States (Mississippi)
2010 - United States (Louisiana)
2005166Sorghum halepenseJohnsongrassG129EPSP synthase inhibitors
28 Urochloa panicoides
Liverseedgrass
2008 - Australia (New South Wales )
2008171Urochloa panicoidesLiverseedgrassG129EPSP synthase inhibitors
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, April 23, 2014 .  Available  www.weedscience.org
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