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 February 26, 2015Kochia scopariaUnited States (Kansas) United StatesKansas201445 Multiple Resistance: 2 Sites of Action
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
101Kochia10973
2 February 26, 2015Kochia scopariaUnited States (Kansas) United StatesKansas201445 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
3 February 24, 2015Matricaria recutita (= M. chamomilla)PolandPoland 201433 ALS inhibitors (B/2)
248Wild Chamomile10971
4 February 24, 2015Lamium amplexicauleUnited States (Kansas) United StatesKansas201445 ALS inhibitors (B/2)
323Henbit Deadnettle10970
5 February 24, 2015Alopecurus myosuroidesPolandPoland 201233 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
6Blackgrass10969
6 February 24, 2015Lolium perenne ssp. multiflorumUnited KingdomUnited Kingdom 201244 ALS inhibitors (B/2)
110Italian Ryegrass10968
7 February 3, 2015Bromus rubensAustralia (Western Australia) AustraliaWestern Australia20141 EPSP synthase inhibitors (G/9)
324Red Brome10964
8 January 30, 2015Lamium amplexicauleUnited States (Kansas) United StatesKansas201445 ALS inhibitors (B/2)
323Henbit Deadnettle10963
9 January 29, 2015Bifora radiansTurkeyTurkey 200871 ALS inhibitors (B/2)
322Wild Bishop10962
10 January 28, 2015Kochia scopariaUnited States (Wyoming) United StatesWyoming201445 EPSP synthase inhibitors (G/9)
101Kochia10961
11 January 28, 2015Papaver rhoeasBelgiumBelgium 20143 ALS inhibitors (B/2)
123Corn Poppy10960
12 January 28, 2015Stellaria mediaBelgiumBelgium 20133 ALS inhibitors (B/2)
168Common Chickweed10959
13 January 26, 2015Amaranthus tuberculatus (=A. rudis)United States (Wisconsin) United StatesWisconsin201345 EPSP synthase inhibitors (G/9)
219Tall Waterhemp10958
14 January 26, 2015Amaranthus palmeriUnited States (Wisconsin) United StatesWisconsin201345 EPSP synthase inhibitors (G/9)
14Palmer Amaranth10957
15 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
16 January 20, 2015Alopecurus japonicusChinaChina 20149 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
5Japanese Foxtail10955
17 January 20, 2015Alopecurus aequalisChinaChina 20149 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
264Shortawn Foxtail10954
18 January 20, 2015Vicia sativaChinaChina 20149 ALS inhibitors (B/2)
321Common Vetch10953
19 January 20, 2015Galium aparineChinaChina 20149 Synthetic Auxins (O/4)
272Catchweed Bedstraw10952
20 January 20, 2015Phalaris brachystachysIranIran 201479 ACCase inhibitors (A/1)
244Shortspike Canarygrass10951
21 January 20, 2015Echinochloa colonaVenezuelaVenezuela 200880 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
78Junglerice10950
22 January 20, 2015Rumex dentatusIndiaIndia 201421 ALS inhibitors (B/2)
320Toothed Dock10949
23 January 20, 2015Leptochloa chinensisMalaysiaMalaysia 200628 PSII inhibitor (Ureas and amides) (C2/7)
223Chinese Sprangletop10948
24 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
25 January 12, 2015Ageratum conyzoidesBrazilBrazil 20135 ALS inhibitors (B/2)
319Tropical Whiteweed9947
26 January 7, 2015Stellaria mediaFinlandFinland 2013139 ALS inhibitors (B/2)
168Common Chickweed9946
27 December 29, 2014Kochia scopariaUnited States (Idaho) United StatesIdaho201445 EPSP synthase inhibitors (G/9)
101Kochia9945
28 December 26, 2014Kochia scopariaUnited States (Oregon) United StatesOregon201445 EPSP synthase inhibitors (G/9)
101Kochia9944
29 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
30 December 9, 2014Kochia scopariaCanada (Manitoba) CanadaManitoba20147 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
101Kochia9942
31 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
32 November 25, 2014Tripleurospermum perforatum (=T. inodorum)FranceFrance 201017 ALS inhibitors (B/2)
116Scentless Chamomile9939
33 November 25, 2014Avena fatuaFranceFrance 200617 ALS inhibitors (B/2)
28Wild Oat9938
34 November 25, 2014Avena sterilisFranceFrance 200617 ALS inhibitors (B/2)
29Sterile Oat9937
35 November 25, 2014Apera spica-ventiFranceFrance 200617 ALS inhibitors (B/2)
20Silky Windgrass9936
36 November 25, 2014Echinochloa phyllopogon (=E. oryzicola)FranceFrance 201317 ALS inhibitors (B/2)
178Late Watergrass9935
37 November 25, 2014Echinochloa crus-galli var. crus-galliFranceFrance 201317 ALS inhibitors (B/2)
79Barnyardgrass9934
38 November 25, 2014Setaria viridisFranceFrance 201117 ALS inhibitors (B/2)
153Green Foxtail9933
39 November 25, 2014Conyza sumatrensisFranceFrance 201017 EPSP synthase inhibitors (G/9)
65Sumatran Fleabane9932
40 November 25, 2014Bromus sterilisFranceFrance 200917 ALS inhibitors (B/2)
289Poverty Brome9931
41 November 25, 2014Helianthus annuusFranceFrance 200917 ALS inhibitors (B/2)
95Common Sunflower9929
42 November 13, 2014Chenopodium albumSwedenSweden 200540 Photosystem II inhibitors (C1/5)
47Common Lambsquarters9928
43 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
44 November 6, 2014Kochia scopariaUnited States (Nebraska) United StatesNebraska201445 Photosystem II inhibitors (C1/5)
101Kochia9926
45 October 17, 2014Ixophorus unisetusMexicoMexico 201429 ALS inhibitors (B/2)
100Pasto Honduras (Mexicangrass)9925
46 October 14, 2014Schoenoplectus mucronatus (=Scirpus mucronatus)United States (California) United StatesCalifornia201445 PSII inhibitor (Ureas and amides) (C2/7)
182Ricefield Bulrush9924
47 October 15, 2014Bidens pilosaMexicoMexico 201429 EPSP synthase inhibitors (G/9)
32Hairy Beggarticks9923
48 September 29, 2014Amaranthus palmeriUnited States (New Jersey) United StatesNew Jersey201445 EPSP synthase inhibitors (G/9)
14Palmer Amaranth9922
49 September 11, 2014Amaranthus palmeriIsraelIsrael 200823 ALS inhibitors (B/2)
14Palmer Amaranth9921
50 September 1, 2014Brachiaria eruciformisAustralia (Queensland) AustraliaQueensland20141 EPSP synthase inhibitors (G/9)
318Sweet Summer Grass8921
51 February 24, 2015Cyperus odoratusVenezuelaVenezuela 201480 ALS inhibitors (B/2)
317Fragrant Flatsedge8920
52 July 8, 2014Amaranthus tuberculatus (=A. rudis)United States (Indiana) United StatesIndiana201445 PPO inhibitors (E/14)
219Tall Waterhemp8919
53 June 26, 2014Chloris elataBrazilBrazil 20145 EPSP synthase inhibitors (G/9)
316Tall Windmill Grass8918
54 June 11, 2014Ambrosia artemisiifoliaUnited States (Nebraska) United StatesNebraska201345 EPSP synthase inhibitors (G/9)
18Common Ragweed8917
55 May 29, 2014Ambrosia artemisiifoliaUnited States (New Jersey) United StatesNew Jersey201345 EPSP synthase inhibitors (G/9)
18Common Ragweed8916
56 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
57 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
58 May 12, 2014Papaver rhoeasSwedenSweden 201140 ALS inhibitors (B/2)
123Corn Poppy8913
59 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
60 May 12, 2014Alopecurus myosuroidesSwedenSweden 201140 ACCase inhibitors (A/1)
6Blackgrass8911
61 May 12, 2014Capsella bursa-pastorisDenmarkDenmark 201213 ALS inhibitors (B/2)
41Shepherd's-purse8910
62 May 8, 2014Echinochloa erectaItalyItaly 200524 PSII inhibitor (Ureas and amides) (C2/7)
236Pollacci Barnyardgrass8909
63 May 8, 2014Avena sterilisItalyItaly 200724 ALS inhibitors (B/2)
29Sterile Oat8908
64 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 200524 ALS inhibitors (B/2)
110Italian Ryegrass8907
65 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 199524 ACCase inhibitors (A/1)
110Italian Ryegrass8906
66 May 8, 2014Sorghum halepenseItalyItaly 200724 ALS inhibitors (B/2)
166Johnsongrass8905
67 May 8, 2014Echinochloa crus-galli var. crus-galliItalyItaly 201124 ACCase inhibitors (A/1)
79Barnyardgrass8904
68 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 201224 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
110Italian Ryegrass8903
69 May 8, 2014Lolium perenne ssp. multiflorumItalyItaly 200824 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
110Italian Ryegrass8902
70 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
71 April 29, 2014Ambrosia artemisiifoliaUnited States (Mississippi) United StatesMississippi201445 EPSP synthase inhibitors (G/9)
18Common Ragweed8900
72 February 3, 2015Ehrharta longifloraAustralia (Western Australia) AustraliaWestern Australia20141 ACCase inhibitors (A/1)
315Longflowered veldtgrass 8899
73 April 16, 2014Lolium perenne ssp. multiflorumUnited States (Louisiana) United StatesLouisiana201445 EPSP synthase inhibitors (G/9)
110Italian Ryegrass8898
74 March 31, 2014Stellaria mediaUnited States (Pennsylvania) United StatesPennsylvania201045 ALS inhibitors (B/2)
168Common Chickweed7898
75 March 7, 2014Echinochloa crus-galli var. crus-galliEgyptEgypt 200915 ACCase inhibitors (A/1)
79Barnyardgrass7897
76 March 7, 2014Echinochloa colonaEgyptEgypt 201215 ALS inhibitors (B/2)
78Junglerice7896
77 March 7, 2014Raphanus raphanistrumBrazilBrazil 20135 ALS inhibitors (B/2)
141Wild Radish7895
78 March 6, 2004Picris hieracioidesRussiaRussia 200065 ALS inhibitors (B/2)
314Hawkweed Oxtongue7894
79 March 4, 2014Polypogon fugaxChinaChina 20149 ACCase inhibitors (A/1)
313Asia Minor bluegrass7893
80 February 3, 2015Sonchus oleraceusAustralia (New South Wales ) AustraliaNew South Wales 20141 EPSP synthase inhibitors (G/9)
164Annual Sowthistle7892
81 February 13, 2014Lolium perenne ssp. multiflorumUnited States (Kentucky) United StatesKentucky201345 ALS inhibitors (B/2)
110Italian Ryegrass7891
82 April 3, 2014Convolvulus arvensisJordanJordan 201155 PSI Electron Diverter (D/22)
312Field Bindweed7890
83 January 28, 2015Matricaria recutita (= M. chamomilla)BelgiumBelgium 20123 ALS inhibitors (B/2)
248Wild Chamomile7889
84 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
85 February 2, 2014Eleusine indicaBoliviaBolivia 20074 EPSP synthase inhibitors (G/9)
81Goosegrass7887
86 February 2, 2014Echinochloa colonaCosta RicaCosta Rica 201311 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
78Junglerice7886
87 January 30, 2014Oryza sativa var. sylvaticaCosta RicaCosta Rica 201011 ALS inhibitors (B/2)
242Red Rice7885
88 January 29, 2014Eleusine indicaCosta RicaCosta Rica 201011 EPSP synthase inhibitors (G/9)
81Goosegrass7884
89 January 28, 2014Stellaria mediaUnited States (Kentucky) United StatesKentucky201345 ALS inhibitors (B/2)
168Common Chickweed7883
90 January 28, 2014Amaranthus palmeriUnited States (Kentucky) United StatesKentucky201045 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7882
91 January 28, 2014Amaranthus tuberculatus (=A. rudis)United States (Kentucky) United StatesKentucky201045 EPSP synthase inhibitors (G/9)
219Tall Waterhemp7881
92 January 27, 2014Clidemia hirtaMalaysiaMalaysia 201028 ALS inhibitors (B/2)
311Soapbush7876
93 February 7, 2014Eleusine indicaMalaysiaMalaysia 200928 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
Glutamine synthase inhibitors (H/10)
81Goosegrass7873
94 January 27, 2014Hedyotis verticillataMalaysiaMalaysia 200528 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
310Woody borreria7872
95 January 24, 2014Alopecurus myosuroidesCzech RepublicCzech Republic 200812 ALS inhibitors (B/2)
6Blackgrass7871
96 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
97 January 24, 2014Amaranthus palmeriUnited States (Florida) United StatesFlorida201345 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7869
98 January 23, 2014Kochia scopariaUnited States (Colorado) United StatesColorado199945 Synthetic Auxins (O/4)
101Kochia7868
99 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
100 January 23, 2014Amaranthus palmeriUnited States (Illinois) United StatesIllinois201345 ALS inhibitors (B/2)
14Palmer Amaranth7866
101 January 23, 2014Conyza canadensisUnited States (Illinois) United StatesIllinois201345 ALS inhibitors (B/2)
61Horseweed7865
102 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
103 January 23, 2014Setaria faberiUnited States (Illinois) United StatesIllinois199845 ACCase inhibitors (A/1)
149Giant Foxtail7863
104 January 23, 2014Setaria faberiUnited States (Illinois) United StatesIllinois200745 ALS inhibitors (B/2)
149Giant Foxtail7862
105 January 23, 2014Sorghum bicolorUnited States (Illinois) United StatesIllinois200045 ALS inhibitors (B/2)
165Shattercane7861
106 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
107 January 4, 2014Amaranthus hybridus (syn: quitensis)United States (Illinois) United StatesIllinois199845 ALS inhibitors (B/2)
12Smooth Pigweed7859
108 January 13, 2014Xanthium strumariumUnited States (Illinois) United StatesIllinois199845 ALS inhibitors (B/2)
174Common cocklebur7858
109 January 22, 2014Ambrosia artemisiifoliaUnited States (North Carolina) United StatesNorth Carolina200645 ALS inhibitors (B/2)
18Common Ragweed7857
110 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
111 January 22, 2014Leptochloa chinensisSouth KoreaSouth Korea 201227 ACCase inhibitors (A/1)
223Chinese Sprangletop7855
112 January 22, 2014Ludwigia prostrataSouth KoreaSouth Korea 201127 ALS inhibitors (B/2)
309False Loosestrife7854
113 January 22, 2014Sagittaria trifoliaSouth KoreaSouth Korea 201127 ALS inhibitors (B/2)
294Threeleaf Arrowhead7851
114 January 22, 2014Blyxa aubertiiSouth KoreaSouth Korea 200627 ALS inhibitors (B/2)
308Roundfruit Blyxa7850
115 January 22, 2014Eleocharis acicularisSouth KoreaSouth Korea 200627 ALS inhibitors (B/2)
295Needle Spikerush7849
116 January 22, 2014Schoenoplectus fluviatilisSouth KoreaSouth Korea 200427 ALS inhibitors (B/2)
307River Bulrush7848
117 January 22, 2014Raphanus raphanistrumAustralia (Victoria) AustraliaVictoria20111 Synthetic Auxins (O/4)
141Wild Radish7846
118 January 22, 2014Raphanus raphanistrumAustralia (Victoria) AustraliaVictoria20091 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
141Wild Radish7845
119 January 22, 2014Sonchus oleraceusAustralia (Victoria) AustraliaVictoria20101 ALS inhibitors (B/2)
164Annual Sowthistle7844
120 January 22, 2014Sisymbrium orientaleAustralia (Victoria) AustraliaVictoria20101 ALS inhibitors (B/2)
159Oriental Mustard7842
121 January 22, 2014Vulpia bromoidesAustralia (Victoria) AustraliaVictoria20091 Photosystem II inhibitors (C1/5)
173Squirreltail Fescue7841
122 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
123 February 3, 2015Raphanus raphanistrumAustralia (New South Wales ) AustraliaNew South Wales 20131 Synthetic Auxins (O/4)
141Wild Radish7839
124 January 21, 2014Phalaris minorAustralia (Victoria) AustraliaVictoria20121 ACCase inhibitors (A/1)
127Little seed Canary grass7838
125 January 21, 2014Galium tricornutumAustralia (South Australia) AustraliaSouth Australia20121 ALS inhibitors (B/2)
306Threehorn Bedstraw7837
126 January 19, 2014Conyza canadensisUnited States (Indiana) United StatesIndiana200545 ALS inhibitors (B/2)
61Horseweed7836
127 January 19, 2014Amaranthus palmeriUnited States (Indiana) United StatesIndiana201245 EPSP synthase inhibitors (G/9)
14Palmer Amaranth7835
128 January 19, 2014Kochia scopariaCanada (Saskatchewan) CanadaSaskatchewan20127 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
101Kochia7834
129 January 19, 2014Ambrosia trifidaCanada (Ontario) CanadaOntario20117 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
184Giant Ragweed7833
130 January 19, 2014Lolium persicumCanada (Alberta) CanadaAlberta20097 ACCase inhibitors (A/1)
181Persian Darnel7832
131 January 19, 2014Salsola tragusCanada (Alberta) CanadaAlberta20077 ALS inhibitors (B/2)
147Russian-thistle7831
132 January 15, 2014Chenopodium albumSerbiaSerbia 2007245 ALS inhibitors (B/2)
47Common Lambsquarters7828
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