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 August 26, 2015Amaranthus tuberculatus (=A. rudis)United States (Minnesota) United StatesMinnesota201445 PPO inhibitors (E/14)
219Tall Waterhemp11004
2 August 21, 2015Parthenium hysterophorusUnited States (Florida) United StatesFlorida201445 EPSP synthase inhibitors (G/9)
124Ragweed Parthenium11003
3 August 20, 2015Polygonum lapathifoliumCanada (Alberta) CanadaAlberta20147 ALS inhibitors (B/2)
134Pale Smartweed11002
4 July 3, 2015Senecio vulgarisFranceFrance 200917 ALS inhibitors (B/2)
148Common Groundsel11001
5 June 29, 2015Sorghum halepenseSpainSpain 201538 ALS inhibitors (B/2)
166Johnsongrass11000
6 June 8, 2015Conyza canadensisJapanJapan 201425 EPSP synthase inhibitors (G/9)
61Horseweed10999
7 June 8, 2015Eleusine indicaJapanJapan 201325 EPSP synthase inhibitors (G/9)
81Goosegrass10998
8 June 8, 2015Echinochloa crus-galli var. formosensisJapanJapan 201025 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
304Taiwan barnyardgrass10997
9 May 12, 2015Apera spica-ventiSwedenSweden 200640 PSII inhibitor (Ureas and amides) (C2/7)
20Silky Windgrass10996
10 May 12, 2015Alopecurus myosuroidesSwedenSweden 201440 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
6Blackgrass10995
11 May 12, 2015Apera spica-ventiSwedenSweden 201040 ALS inhibitors (B/2)
20Silky Windgrass10994
12 April 28, 2015Senecio vernalisIsraelIsrael 201423 Multiple Resistance: 5 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
PSII inhibitor (Ureas and amides) (C2/7)
PPO inhibitors (E/14)
Carotenoid biosynthesis inhibitors (F1/12)
327Eastern Groundsel10993
13 April 28, 2015Lolium rigidumIsraelIsrael 201323 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
112Rigid Ryegrass10992
14 April 24, 2015Sorghum halepenseArgentinaArgentina 201548 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
166Johnsongrass10991
15 April 19, 2015Brachypodium distachyonIsraelIsrael 201423 ACCase inhibitors (A/1)
35Annual Falsebrome10990
16 April 15, 2015Sonchus oleraceusAustralia (South Australia) AustraliaSouth Australia20151 ALS inhibitors (B/2)
164Annual Sowthistle10989
17 April 15, 2015Sonchus oleraceusAustralia (South Australia) AustraliaSouth Australia20151 Synthetic Auxins (O/4)
164Annual Sowthistle10988
18 April 15, 2015Anthemis cotulaUnited States (Washington) United StatesWashington201045 ALS inhibitors (B/2)
19Mayweed Chamomile10987
19 April 11, 2015Kochia scopariaUnited States (North Dakota) United StatesNorth Dakota200445 Multiple Resistance: 2 Sites of Action
Photosystem II inhibitors (C1/5)
PSII inhibitor (Ureas and amides) (C2/7)
101Kochia10986
20 April 7, 2015Avena sterilis ssp. ludovicianaIranIran 200979 ALS inhibitors (B/2)
30Sterile oat10985
21 April 1, 2015Matricaria recutita (= M. chamomilla)PolandPoland 201433 ALS inhibitors (B/2)
248Wild Chamomile10984
22 March 31, 2015Papaver rhoeasPolandPoland 201433 ALS inhibitors (B/2)
123Corn Poppy10983
23 March 27, 2015Poa annuaUnited States (Mississippi) United StatesMississippi201445 ALS inhibitors (B/2)
130Annual Bluegrass10982
24 March 25, 2015Ambrosia artemisiifoliaUnited States (Wisconsin) United StatesWisconsin201345 ALS inhibitors (B/2)
18Common Ragweed10981
25 March 20, 2015Amaranthus tuberculatus (=A. rudis)United States (Arkansas) United StatesArkansas201545 EPSP synthase inhibitors (G/9)
219Tall Waterhemp10980
26 March 16, 2015Sorghum halepenseArgentinaArgentina 201548 ACCase inhibitors (A/1)
166Johnsongrass10979
27 March 9, 2015Alopecurus myosuroidesNetherlandsNetherlands 201043 ALS inhibitors (B/2)
6Blackgrass10978
28 March 9, 2015Polygonum persicariaNorwayNorway 200931 ALS inhibitors (B/2)
136Ladysthumb10977
29 March 9, 2015Sonchus asperNorwayNorway 200631 ALS inhibitors (B/2)
163Spiny Sowthistle10976
30 March 9, 2015Tripleurospermum perforatum (=T. inodorum)NorwayNorway 200631 ALS inhibitors (B/2)
116Scentless Chamomile10975
31 March 9, 2015Spergula arvensisNorwayNorway 200631 ALS inhibitors (B/2)
326Corn Spurry10974
32 March 2, 2015Kochia scopariaUnited States (Kansas) United StatesKansas201345 Multiple Resistance: 2 Sites of Action
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
101Kochia10973
33 March 2, 2015Kochia scopariaUnited States (Kansas) United StatesKansas201345 Multiple Resistance: 4 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
101Kochia10972
34 March 31, 2015Tripleurospermum perforatum (=T. inodorum)PolandPoland 201433 ALS inhibitors (B/2)
116Scentless Chamomile10971
35 February 24, 2015Lamium amplexicauleUnited States (Kansas) United StatesKansas201445 ALS inhibitors (B/2)
323Henbit Deadnettle10970
36 March 31, 2015Alopecurus myosuroidesPolandPoland 201233 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
6Blackgrass10969
37 February 24, 2015Lolium perenne ssp. multiflorumUnited KingdomUnited Kingdom 201244 ALS inhibitors (B/2)
110Italian Ryegrass10968
38 February 3, 2015Bromus rubensAustralia (Western Australia) AustraliaWestern Australia20141 EPSP synthase inhibitors (G/9)
324Red Brome10964
39 January 30, 2015Lamium amplexicauleUnited States (Kansas) United StatesKansas201445 ALS inhibitors (B/2)
323Henbit Deadnettle10963
40 January 29, 2015Bifora radiansTurkeyTurkey 200871 ALS inhibitors (B/2)
322Wild Bishop10962
41 January 28, 2015Kochia scopariaUnited States (Wyoming) United StatesWyoming201445 EPSP synthase inhibitors (G/9)
101Kochia10961
42 January 28, 2015Papaver rhoeasBelgiumBelgium 20143 ALS inhibitors (B/2)
123Corn Poppy10960
43 January 28, 2015Stellaria mediaBelgiumBelgium 20133 ALS inhibitors (B/2)
168Common Chickweed10959
44 January 26, 2015Amaranthus tuberculatus (=A. rudis)United States (Wisconsin) United StatesWisconsin201345 EPSP synthase inhibitors (G/9)
219Tall Waterhemp10958
45 January 26, 2015Amaranthus palmeriUnited States (Wisconsin) United StatesWisconsin201345 EPSP synthase inhibitors (G/9)
14Palmer Amaranth10957
46 January 25, 2015Echinochloa colonaUnited States (Arkansas) United StatesArkansas201145 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
PSII inhibitor (Ureas and amides) (C2/7)
Cellulose inhibitors (L/26)
78Junglerice10956
47 January 20, 2015Alopecurus japonicusChinaChina 20149 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
5Japanese Foxtail10955
48 January 20, 2015Alopecurus aequalisChinaChina 20149 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
264Shortawn Foxtail10954
49 January 20, 2015Vicia sativaChinaChina 20149 ALS inhibitors (B/2)
321Common Vetch10953
50 January 20, 2015Galium aparineChinaChina 20149 Synthetic Auxins (O/4)
272Catchweed Bedstraw10952
51 January 20, 2015Phalaris brachystachysIranIran 201479 ACCase inhibitors (A/1)
244Shortspike Canarygrass10951
52 January 20, 2015Echinochloa colonaVenezuelaVenezuela 200880 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
78Junglerice10950
53 January 20, 2015Rumex dentatusIndiaIndia 201421 ALS inhibitors (B/2)
320Toothed Dock10949
54 January 20, 2015Leptochloa chinensisMalaysiaMalaysia 200628 PSII inhibitor (Ureas and amides) (C2/7)
223Chinese Sprangletop10948
55 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
56 January 12, 2015Ageratum conyzoidesBrazilBrazil 20135 ALS inhibitors (B/2)
319Tropical Whiteweed9947
57 January 7, 2015Stellaria mediaFinlandFinland 2013139 ALS inhibitors (B/2)
168Common Chickweed9946
58 December 29, 2014Kochia scopariaUnited States (Idaho) United StatesIdaho201445 EPSP synthase inhibitors (G/9)
101Kochia9945
59 December 26, 2014Kochia scopariaUnited States (Oregon) United StatesOregon201445 EPSP synthase inhibitors (G/9)
101Kochia9944
60 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
61 December 9, 2014Kochia scopariaCanada (Manitoba) CanadaManitoba20147 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
101Kochia9942
62 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
63 November 25, 2014Tripleurospermum perforatum (=T. inodorum)FranceFrance 201017 ALS inhibitors (B/2)
116Scentless Chamomile9939
64 November 25, 2014Avena fatuaFranceFrance 200617 ALS inhibitors (B/2)
28Wild Oat9938
65 November 25, 2014Avena sterilisFranceFrance 200617 ALS inhibitors (B/2)
29Sterile Oat9937
66 November 25, 2014Apera spica-ventiFranceFrance 200617 ALS inhibitors (B/2)
20Silky Windgrass9936
67 November 25, 2014Echinochloa phyllopogon (=E. oryzicola)FranceFrance 201317 ALS inhibitors (B/2)
178Late Watergrass9935
68 November 25, 2014Echinochloa crus-galli var. crus-galliFranceFrance 201317 ALS inhibitors (B/2)
79Barnyardgrass9934
69 November 25, 2014Setaria viridisFranceFrance 201117 ALS inhibitors (B/2)
153Green Foxtail9933
70 November 25, 2014Conyza sumatrensisFranceFrance 201017 EPSP synthase inhibitors (G/9)
65Sumatran Fleabane9932
71 November 25, 2014Bromus sterilisFranceFrance 200917 ALS inhibitors (B/2)
289Poverty Brome9931
72 November 25, 2014Helianthus annuusFranceFrance 200917 ALS inhibitors (B/2)
95Common Sunflower9929
73 November 13, 2014Chenopodium albumSwedenSweden 200540 Photosystem II inhibitors (C1/5)
47Common Lambsquarters9928
74 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
75 November 6, 2014Kochia scopariaUnited States (Nebraska) United StatesNebraska201445 Photosystem II inhibitors (C1/5)
101Kochia9926
76 October 17, 2014Ixophorus unisetusMexicoMexico 201429 ALS inhibitors (B/2)
100Pasto Honduras (Mexicangrass)9925
77 October 14, 2014Schoenoplectus mucronatus (=Scirpus mucronatus)United States (California) United StatesCalifornia201445 PSII inhibitor (Ureas and amides) (C2/7)
182Ricefield Bulrush9924
78 October 15, 2014Bidens pilosaMexicoMexico 201429 EPSP synthase inhibitors (G/9)
32Hairy Beggarticks9923
79 September 29, 2014Amaranthus palmeriUnited States (New Jersey) United StatesNew Jersey201445 EPSP synthase inhibitors (G/9)
14Palmer Amaranth9922
80 September 11, 2014Amaranthus palmeriIsraelIsrael 200823 ALS inhibitors (B/2)
14Palmer Amaranth9921
81 September 1, 2014Brachiaria eruciformisAustralia (Queensland) AustraliaQueensland20141 EPSP synthase inhibitors (G/9)
318Sweet Summer Grass8921
82 February 24, 2015Cyperus odoratusVenezuelaVenezuela 201480 ALS inhibitors (B/2)
317Fragrant Flatsedge8920
83 July 8, 2014Amaranthus tuberculatus (=A. rudis)United States (Indiana) United StatesIndiana201445 PPO inhibitors (E/14)
219Tall Waterhemp8919
84 June 26, 2014Chloris elataBrazilBrazil 20145 EPSP synthase inhibitors (G/9)
316Tall Windmill Grass8918
85 June 11, 2014Ambrosia artemisiifoliaUnited States (Nebraska) United StatesNebraska201345 EPSP synthase inhibitors (G/9)
18Common Ragweed8917
86 May 29, 2014Ambrosia artemisiifoliaUnited States (New Jersey) United StatesNew Jersey201345 EPSP synthase inhibitors (G/9)
18Common Ragweed8916
87 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
88 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
89 May 12, 2014Papaver rhoeasSwedenSweden 201140 ALS inhibitors (B/2)
123Corn Poppy8913
90 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
91 May 12, 2014Alopecurus myosuroidesSwedenSweden 201140 ACCase inhibitors (A/1)
6Blackgrass8911
92 May 12, 2014Capsella bursa-pastorisDenmarkDenmark 201213 ALS inhibitors (B/2)
41Shepherd's-purse8910
93 May 8, 2014Echinochloa erectaItalyItaly 200524 PSII inhibitor (Ureas and amides) (C2/7)
236Pollacci Barnyardgrass8909
94 May 8, 2014Avena sterilisItalyItaly 200724 ALS inhibitors (B/2)
29Sterile Oat8908
95 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 200524 ALS inhibitors (B/2)
110Italian Ryegrass8907
96 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 199524 ACCase inhibitors (A/1)
110Italian Ryegrass8906
97 May 8, 2014Sorghum halepenseItalyItaly 200724 ALS inhibitors (B/2)
166Johnsongrass8905
98 May 8, 2014Echinochloa crus-galli var. crus-galliItalyItaly 201124 ACCase inhibitors (A/1)
79Barnyardgrass8904
99 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 201224 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
110Italian Ryegrass8903
100 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 200824 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
110Italian Ryegrass8902
101 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
102 April 29, 2014Ambrosia artemisiifoliaUnited States (Mississippi) United StatesMississippi201445 EPSP synthase inhibitors (G/9)
18Common Ragweed8900
103 February 3, 2015Ehrharta longifloraAustralia (Western Australia) AustraliaWestern Australia20141 ACCase inhibitors (A/1)
315Longflowered veldtgrass 8899
104 April 16, 2014Lolium perenne ssp. multiflorumUnited States (Louisiana) United StatesLouisiana201445 EPSP synthase inhibitors (G/9)
110Italian Ryegrass8898
105 March 31, 2014Stellaria mediaUnited States (Pennsylvania) United StatesPennsylvania201045 ALS inhibitors (B/2)
168Common Chickweed7898
106 March 7, 2014Echinochloa crus-galli var. crus-galliEgyptEgypt 200915 ACCase inhibitors (A/1)
79Barnyardgrass7897
107 March 7, 2014Echinochloa colonaEgyptEgypt 201215 ALS inhibitors (B/2)
78Junglerice7896
108 March 7, 2014Raphanus raphanistrumBrazilBrazil 20135 ALS inhibitors (B/2)
141Wild Radish7895
109 March 6, 2004Picris hieracioidesRussiaRussia 200065 ALS inhibitors (B/2)
314Hawkweed Oxtongue7894
110 March 4, 2014Polypogon fugaxChinaChina 20149 ACCase inhibitors (A/1)
313Asia Minor bluegrass7893
111 February 3, 2015Sonchus oleraceusAustralia (New South Wales ) AustraliaNew South Wales 20141 EPSP synthase inhibitors (G/9)
164Annual Sowthistle7892
112 February 13, 2014Lolium perenne ssp. multiflorumUnited States (Kentucky) United StatesKentucky201345 ALS inhibitors (B/2)
110Italian Ryegrass7891
113 April 3, 2014Convolvulus arvensisJordanJordan 201155 PSI Electron Diverter (D/22)
312Field Bindweed7890
114 January 28, 2015Matricaria recutita (= M. chamomilla)BelgiumBelgium 20123 ALS inhibitors (B/2)
248Wild Chamomile7889
115 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
116 February 2, 2014Eleusine indicaBoliviaBolivia 20074 EPSP synthase inhibitors (G/9)
81Goosegrass7887
117 February 2, 2014Echinochloa colonaCosta RicaCosta Rica 201311 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
78Junglerice7886
118 January 30, 2014Oryza sativa var. sylvaticaCosta RicaCosta Rica 201011 ALS inhibitors (B/2)
242Red Rice7885
119 January 29, 2014Eleusine indicaCosta RicaCosta Rica 201011 EPSP synthase inhibitors (G/9)
81Goosegrass7884
120 January 28, 2014Stellaria mediaUnited States (Kentucky) United StatesKentucky201345 ALS inhibitors (B/2)
168Common Chickweed7883
121 January 28, 2014Amaranthus palmeriUnited States (Kentucky) United StatesKentucky201045 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7882
122 January 28, 2014Amaranthus tuberculatus (=A. rudis)United States (Kentucky) United StatesKentucky201045 EPSP synthase inhibitors (G/9)
219Tall Waterhemp7881
123 January 27, 2014Clidemia hirtaMalaysiaMalaysia 201028 ALS inhibitors (B/2)
311Soapbush7876
124 February 7, 2014Eleusine indicaMalaysiaMalaysia 200928 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
Glutamine synthase inhibitors (H/10)
81Goosegrass7873
125 January 27, 2014Hedyotis verticillataMalaysiaMalaysia 200528 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
310Woody borreria7872
126 January 24, 2014Alopecurus myosuroidesCzech RepublicCzech Republic 200812 ALS inhibitors (B/2)
6Blackgrass7871
127 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
128 January 24, 2014Amaranthus palmeriUnited States (Florida) United StatesFlorida201345 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7869
129 January 23, 2014Kochia scopariaUnited States (Colorado) United StatesColorado199945 Synthetic Auxins (O/4)
101Kochia7868
130 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
131 January 23, 2014Amaranthus palmeriUnited States (Illinois) United StatesIllinois201345 ALS inhibitors (B/2)
14Palmer Amaranth7866
132 January 23, 2014Conyza canadensisUnited States (Illinois) United StatesIllinois201345 ALS inhibitors (B/2)
61Horseweed7865
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