International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
Most Recent Cases of Herbicide Resistant Weeds Entered into the Database
(click on a column header to sort or click on a country for details)
#Date Last UpdatedSpeciesCountryFirst YearSite of Action
1 January 20, 2015Amaranthus hybridus (syn: quitensis)ArgentinaArgentina 201448 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
12Smooth Pigweed9948
2 January 20, 2015Alopecurus japonicusChinaChina 20149 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
5Japanese Foxtail10955
3 January 20, 2015Vicia sativaChinaChina 20149 ALS inhibitors (B/2)
321Common Vetch10953
4 January 20, 2015Galium aparineChinaChina 20149 Synthetic Auxins (O/4)
272Catchweed Bedstraw10952
5 January 20, 2015Alopecurus aequalisChinaChina 20149 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
264Shortawn Foxtail10954
6 January 20, 2015Phalaris brachystachysIranIran 201479 ACCase inhibitors (A/1)
244Shortspike Canarygrass10951
7 January 20, 2015Rumex dentatusIndiaIndia 201421 ALS inhibitors (B/2)
320Toothed Dock10949
8 January 20, 2015Echinochloa colonaVenezuelaVenezuela 200880 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
78Junglerice10950
9 January 20, 2015Eleusine indicaMalaysiaMalaysia 200928 Multiple Resistance: 4 Sites of Action
ACCase inhibitors (A/1)
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
Glutamine synthase inhibitors (H/10)
81Goosegrass9927
10 January 20, 2015Leptochloa chinensisMalaysiaMalaysia 200628 PSII inhibitor (Ureas and amides) (C2/7)
223Chinese Sprangletop10948
11 January 12, 2015Ageratum conyzoidesBrazilBrazil 20135 ALS inhibitors (B/2)
319Tropical Whiteweed9947
12 January 7, 2015Stellaria mediaFinlandFinland 2013139 ALS inhibitors (B/2)
168Common Chickweed9946
13 December 29, 2014Kochia scopariaUnited States (Idaho) United StatesIdaho201445 EPSP synthase inhibitors (G/9)
101Kochia9945
14 December 26, 2014Kochia scopariaUnited States (Oregon) United StatesOregon201445 EPSP synthase inhibitors (G/9)
101Kochia9944
15 December 17, 2014Conyza canadensisUnited States (California) United StatesCalifornia201445 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
61Horseweed9943
16 December 9, 2014Kochia scopariaCanada (Manitoba) CanadaManitoba20147 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
101Kochia9942
17 December 5, 2014Amaranthus tuberculatus (=A. rudis)Canada (Ontario) CanadaOntario20147 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
219Tall Waterhemp9940
18 November 25, 2014Tripleurospermum perforatum (=T. inodorum)FranceFrance 201017 ALS inhibitors (B/2)
116Scentless Chamomile9939
19 November 25, 2014Avena fatuaFranceFrance 200617 ALS inhibitors (B/2)
28Wild Oat9938
20 November 25, 2014Avena sterilisFranceFrance 200617 ALS inhibitors (B/2)
29Sterile Oat9937
21 November 25, 2014Apera spica-ventiFranceFrance 200617 ALS inhibitors (B/2)
20Silky Windgrass9936
22 November 25, 2014Echinochloa phyllopogon (=E. oryzicola)FranceFrance 201317 ALS inhibitors (B/2)
178Late Watergrass9935
23 November 25, 2014Echinochloa crus-galli var. crus-galliFranceFrance 201317 ALS inhibitors (B/2)
79Barnyardgrass9934
24 November 25, 2014Setaria viridisFranceFrance 201117 ALS inhibitors (B/2)
153Green Foxtail9933
25 November 25, 2014Conyza sumatrensisFranceFrance 201017 EPSP synthase inhibitors (G/9)
65Sumatran Fleabane9932
26 November 25, 2014Bromus sterilisFranceFrance 200917 ALS inhibitors (B/2)
289Poverty Brome9931
27 November 25, 2014Helianthus annuusFranceFrance 200917 ALS inhibitors (B/2)
95Common Sunflower9929
28 November 13, 2014Chenopodium albumSwedenSweden 200540 Photosystem II inhibitors (C1/5)
47Common Lambsquarters9928
29 November 6, 2014Kochia scopariaUnited States (Nebraska) United StatesNebraska201445 Photosystem II inhibitors (C1/5)
101Kochia9926
30 October 17, 2014Ixophorus unisetusMexicoMexico 201429 ALS inhibitors (B/2)
100Pasto Honduras (Mexicangrass)9925
31 October 15, 2014Bidens pilosaMexicoMexico 201429 EPSP synthase inhibitors (G/9)
32Hairy Beggarticks9923
32 October 14, 2014Schoenoplectus mucronatus (=Scirpus mucronatus)United States (California) United StatesCalifornia201445 PSII inhibitor (Ureas and amides) (C2/7)
182Ricefield Bulrush9924
33 September 29, 2014Amaranthus palmeriUnited States (New Jersey) United StatesNew Jersey201445 EPSP synthase inhibitors (G/9)
14Palmer Amaranth9922
34 September 11, 2014Amaranthus palmeriIsraelIsrael 200823 ALS inhibitors (B/2)
14Palmer Amaranth9921
35 September 1, 2014Brachiaria eruciformisAustralia (Queensland) AustraliaQueensland20141 EPSP synthase inhibitors (G/9)
318Sweet Summer Grass8921
36 July 20, 2014Cyperus odoratusVenezuelaVenezuela 201480 ALS inhibitors (B/2)
317Fragrant Flatsedge8920
37 July 8, 2014Amaranthus tuberculatus (=A. rudis)United States (Indiana) United StatesIndiana201445 PPO inhibitors (E/14)
219Tall Waterhemp8919
38 June 26, 2014Chloris elataBrazilBrazil 20145 EPSP synthase inhibitors (G/9)
316Tall Windmill Grass8918
39 June 11, 2014Ambrosia artemisiifoliaUnited States (Nebraska) United StatesNebraska201345 EPSP synthase inhibitors (G/9)
18Common Ragweed8917
40 May 29, 2014Amaranthus palmeriUnited States (Maryland) United StatesMaryland201445 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
14Palmer Amaranth8915
41 May 29, 2014Amaranthus palmeriUnited States (Delaware) United StatesDelaware201445 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
14Palmer Amaranth8914
42 May 29, 2014Ambrosia artemisiifoliaUnited States (New Jersey) United StatesNew Jersey201345 EPSP synthase inhibitors (G/9)
18Common Ragweed8916
43 May 12, 2014Papaver rhoeasSwedenSweden 201140 ALS inhibitors (B/2)
123Corn Poppy8913
44 May 12, 2014Alopecurus myosuroidesSwedenSweden 201140 ACCase inhibitors (A/1)
6Blackgrass8911
45 May 12, 2014Alopecurus myosuroidesSwedenSweden 201140 Multiple Resistance: 3 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
Lipid Inhibitors (thiocarbamates) (N/8)
6Blackgrass8912
46 May 12, 2014Capsella bursa-pastorisDenmarkDenmark 201213 ALS inhibitors (B/2)
41Shepherd's-purse8910
47 May 8, 2014Echinochloa erectaItalyItaly 200524 PSII inhibitor (Ureas and amides) (C2/7)
236Pollacci Barnyardgrass8909
48 May 8, 2014Avena sterilisItalyItaly 200724 ALS inhibitors (B/2)
29Sterile Oat8908
49 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 200524 ALS inhibitors (B/2)
110Italian Ryegrass8907
50 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 199524 ACCase inhibitors (A/1)
110Italian Ryegrass8906
51 May 8, 2014Sorghum halepenseItalyItaly 200724 ALS inhibitors (B/2)
166Johnsongrass8905
52 May 8, 2014Echinochloa crus-galli var. crus-galliItalyItaly 201124 ACCase inhibitors (A/1)
79Barnyardgrass8904
53 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 201224 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
110Italian Ryegrass8903
54 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 200824 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
110Italian Ryegrass8902
55 April 29, 2014Echinochloa crus-galli var. crus-galliUnited States (Mississippi) United StatesMississippi201145 Multiple Resistance: 4 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
PSII inhibitor (Ureas and amides) (C2/7)
Cellulose inhibitors (L/26)
79Barnyardgrass8901
56 April 29, 2014Ambrosia artemisiifoliaUnited States (Mississippi) United StatesMississippi201445 EPSP synthase inhibitors (G/9)
18Common Ragweed8900
57 April 22, 2014Ehrharta longifloraAustralia (Western Australia) AustraliaWestern Australia20141 ACCase inhibitors (A/1)
315Longflowered veldtgrass 8899
58 April 16, 2014Lolium perenne ssp. multiflorumUnited States (Louisiana) United StatesLouisiana201445 EPSP synthase inhibitors (G/9)
110Italian Ryegrass8898
59 April 3, 2014Convolvulus arvensisJordanJordan 201155 PSI Electron Diverter (D/22)
312Field Bindweed7890
60 March 31, 2014Stellaria mediaUnited States (Pennsylvania) United StatesPennsylvania201045 ALS inhibitors (B/2)
168Common Chickweed7898
61 March 7, 2014Echinochloa crus-galli var. crus-galliEgyptEgypt 200915 ACCase inhibitors (A/1)
79Barnyardgrass7897
62 March 7, 2014Echinochloa colonaEgyptEgypt 201215 ALS inhibitors (B/2)
78Junglerice7896
63 March 7, 2014Raphanus raphanistrumBrazilBrazil 20135 ALS inhibitors (B/2)
141Wild Radish7895
64 March 4, 2014Polypogon fugaxChinaChina 20149 ACCase inhibitors (A/1)
313Asia Minor bluegrass7893
65 February 13, 2014Sonchus oleraceusAustralia (New South Wales ) AustraliaNew South Wales 20141 EPSP synthase inhibitors (G/9)
164Annual Sowthistle7892
66 February 13, 2014Lolium perenne ssp. multiflorumUnited States (Kentucky) United StatesKentucky201345 ALS inhibitors (B/2)
110Italian Ryegrass7891
67 February 7, 2014Matricaria recutita (= M. chamomilla)BelgiumBelgium 20123 ALS inhibitors (B/2)
248Wild Chamomile7889
68 February 7, 2014Eleusine indicaMalaysiaMalaysia 200928 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
Glutamine synthase inhibitors (H/10)
81Goosegrass7873
69 February 3, 2014Raphanus raphanistrumAustralia (Western Australia) AustraliaWestern Australia20101 Multiple Resistance: 4 Sites of Action
ALS inhibitors (B/2)
Carotenoid biosynthesis inhibitors (F1/12)
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
141Wild Radish7888
70 February 2, 2014Eleusine indicaBoliviaBolivia 20074 EPSP synthase inhibitors (G/9)
81Goosegrass7887
71 February 2, 2014Echinochloa colonaCosta RicaCosta Rica 201311 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
78Junglerice7886
72 January 30, 2014Oryza sativa var. sylvaticaCosta RicaCosta Rica 201011 ALS inhibitors (B/2)
242Red Rice7885
73 January 29, 2014Eleusine indicaCosta RicaCosta Rica 201011 EPSP synthase inhibitors (G/9)
81Goosegrass7884
74 January 28, 2014Stellaria mediaUnited States (Kentucky) United StatesKentucky201345 ALS inhibitors (B/2)
168Common Chickweed7883
75 January 28, 2014Amaranthus palmeriUnited States (Kentucky) United StatesKentucky201045 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7882
76 January 28, 2014Amaranthus tuberculatus (=A. rudis)United States (Kentucky) United StatesKentucky201045 EPSP synthase inhibitors (G/9)
219Tall Waterhemp7881
77 January 27, 2014Clidemia hirtaMalaysiaMalaysia 201028 ALS inhibitors (B/2)
311Soapbush7876
78 January 27, 2014Hedyotis verticillataMalaysiaMalaysia 200528 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
310Woody borreria7872
79 January 24, 2014Alopecurus myosuroidesCzech RepublicCzech Republic 200812 ALS inhibitors (B/2)
6Blackgrass7871
80 January 24, 2014Amaranthus palmeriUnited States (Florida) United StatesFlorida201345 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7869
81 January 24, 2014Amaranthus palmeriUnited States (Florida) United StatesFlorida201345 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
14Palmer Amaranth7870
82 January 23, 2014Kochia scopariaUnited States (Colorado) United StatesColorado199945 Synthetic Auxins (O/4)
101Kochia7868
83 January 23, 2014Amaranthus palmeriUnited States (Illinois) United StatesIllinois201345 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
14Palmer Amaranth7867
84 January 23, 2014Amaranthus palmeriUnited States (Illinois) United StatesIllinois201345 ALS inhibitors (B/2)
14Palmer Amaranth7866
85 January 23, 2014Conyza canadensisUnited States (Illinois) United StatesIllinois201345 ALS inhibitors (B/2)
61Horseweed7865
86 January 23, 2014Amaranthus tuberculatus (=A. rudis)United States (Illinois) United StatesIllinois200945 Multiple Resistance: 4 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
219Tall Waterhemp7864
87 January 23, 2014Setaria faberiUnited States (Illinois) United StatesIllinois199845 ACCase inhibitors (A/1)
149Giant Foxtail7863
88 January 23, 2014Setaria faberiUnited States (Illinois) United StatesIllinois200745 ALS inhibitors (B/2)
149Giant Foxtail7862
89 January 23, 2014Sorghum bicolorUnited States (Illinois) United StatesIllinois200045 ALS inhibitors (B/2)
165Shattercane7861
90 January 22, 2014Lolium perenne ssp. multiflorumUnited States (North Carolina) United StatesNorth Carolina200945 EPSP synthase inhibitors (G/9)
110Italian Ryegrass7811
91 January 22, 2014Ambrosia artemisiifoliaUnited States (North Carolina) United StatesNorth Carolina200645 ALS inhibitors (B/2)
18Common Ragweed7857
92 January 22, 2014Lolium perenne ssp. multiflorumUnited States (North Carolina) United StatesNorth Carolina200745 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
110Italian Ryegrass7856
93 January 22, 2014Leptochloa chinensisSouth KoreaSouth Korea 201227 ACCase inhibitors (A/1)
223Chinese Sprangletop7855
94 January 22, 2014Ludwigia prostrataSouth KoreaSouth Korea 201127 ALS inhibitors (B/2)
309False Loosestrife7854
95 January 22, 2014Sagittaria trifoliaSouth KoreaSouth Korea 201127 ALS inhibitors (B/2)
294Threeleaf Arrowhead7851
96 January 22, 2014Blyxa aubertiiSouth KoreaSouth Korea 200627 ALS inhibitors (B/2)
308Roundfruit Blyxa7850
97 January 22, 2014Eleocharis acicularisSouth KoreaSouth Korea 200627 ALS inhibitors (B/2)
295Needle Spikerush7849
98 January 22, 2014Schoenoplectus fluviatilisSouth KoreaSouth Korea 200427 ALS inhibitors (B/2)
307River Bulrush7848
99 January 22, 2014Raphanus raphanistrumAustralia (Victoria) AustraliaVictoria20111 Synthetic Auxins (O/4)
141Wild Radish7846
100 January 22, 2014Raphanus raphanistrumAustralia (Victoria) AustraliaVictoria20091 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
141Wild Radish7845
101 January 22, 2014Sonchus oleraceusAustralia (Victoria) AustraliaVictoria20101 ALS inhibitors (B/2)
164Annual Sowthistle7844
102 January 22, 2014Sisymbrium orientaleAustralia (Victoria) AustraliaVictoria20101 ALS inhibitors (B/2)
159Oriental Mustard7842
103 January 22, 2014Vulpia bromoidesAustralia (Victoria) AustraliaVictoria20091 Photosystem II inhibitors (C1/5)
173Squirreltail Fescue7841
104 January 22, 2014Phalaris paradoxaAustralia (New South Wales ) AustraliaNew South Wales 20121 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
128Hood Canarygrass7840
105 January 22, 2014Raphanus raphanistrumAustralia (New South Wales ) AustraliaNew South Wales 20131 Synthetic Auxins (O/4)
141Wild Radish7839
106 January 21, 2014Phalaris minorAustralia (Victoria) AustraliaVictoria20121 ACCase inhibitors (A/1)
127Little seed Canary grass7838
107 January 21, 2014Galium tricornutumAustralia (South Australia) AustraliaSouth Australia20121 ALS inhibitors (B/2)
306Threehorn Bedstraw7837
108 January 19, 2014Conyza canadensisUnited States (Indiana) United StatesIndiana200545 ALS inhibitors (B/2)
61Horseweed7836
109 January 19, 2014Amaranthus palmeriUnited States (Indiana) United StatesIndiana201245 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7835
110 January 19, 2014Kochia scopariaCanada (Saskatchewan) CanadaSaskatchewan20127 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
101Kochia7834
111 January 19, 2014Ambrosia trifidaCanada (Ontario) CanadaOntario20117 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
184Giant Ragweed7833
112 January 19, 2014Lolium persicumCanada (Alberta) CanadaAlberta20097 ACCase inhibitors (A/1)
181Persian Darnel7832
113 January 19, 2014Salsola tragusCanada (Alberta) CanadaAlberta20077 ALS inhibitors (B/2)
147Russian-thistle7831
114 January 15, 2014Chenopodium albumSerbiaSerbia 2007245 ALS inhibitors (B/2)
47Common Lambsquarters7828
115 January 15, 2014Datura stramoniumSerbiaSerbia 2004245 ALS inhibitors (B/2)
75Jimsonweed7826
116 January 14, 2014Lolium perennePortugalPortugal 201334 EPSP synthase inhibitors (G/9)
111Perennial Ryegrass7825
117 January 14, 2014Conyza canadensisPortugalPortugal 201134 EPSP synthase inhibitors (G/9)
61Horseweed7824
118 January 13, 2014Xanthium strumariumUnited States (Illinois) United StatesIllinois199845 ALS inhibitors (B/2)
174Common cocklebur7858
119 January 8, 2014Conyza canadensisUnited States (Wisconsin) United StatesWisconsin201345 EPSP synthase inhibitors (G/9)
61Horseweed7823
120 January 8, 2014Ambrosia trifidaUnited States (Wisconsin) United StatesWisconsin201345 ALS inhibitors (B/2)
184Giant Ragweed7822
121 January 8, 2014Apera spica-ventiLithuaniaLithuania 2013185 ALS inhibitors (B/2)
20Silky Windgrass7821
122 January 8, 2014Echinochloa crusgalli var. zelayensisChinaChina 20139 Synthetic Auxins (O/4)
305Gulf Cockspur Grass7817
123 January 7, 2014Phalaris minorIndiaIndia 201321 ALS inhibitors (B/2)
127Little seed Canary grass7816
124 January 7, 2014Phalaris minorIndiaIndia 199421 ACCase inhibitors (A/1)
127Little seed Canary grass7815
125 January 7, 2014Echinochloa crus-galli var. crus-galliUruguayUruguay 201373 ALS inhibitors (B/2)
79Barnyardgrass7813
126 January 5, 2014Galium aparineTurkeyTurkey 200871 ALS inhibitors (B/2)
272Catchweed Bedstraw7814
127 January 4, 2014Amaranthus hybridus (syn: quitensis)United States (Illinois) United StatesIllinois199845 ALS inhibitors (B/2)
12Smooth Pigweed7859
128 January 3, 2014Echinochloa crus-galli var. crus-galliUruguayUruguay 201373 Synthetic Auxins (O/4)
79Barnyardgrass7812
129 January 3, 2014Amaranthus hybridus (syn: quitensis)United States (Illinois) United StatesIllinois200045 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
12Smooth Pigweed7860
130 January 2, 2014Kochia scopariaUnited States (Montana) United StatesMontana201345 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
101Kochia7810
131 January 2, 2014Lolium perenne ssp. multiflorumUnited States (Missouri) United StatesMissouri201345 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
110Italian Ryegrass7809
132 March 6, 2004Picris hieracioidesRussiaRussia 200065 ALS inhibitors (B/2)
314Hawkweed Oxtongue7894
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