International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
select
select
Herbicide Resistant Redroot Pigweed Globally
(Amaranthus retroflexus)
Herbicide Resistant Redroot Pigweed Globally
(Amaranthus retroflexus)
Drag a column header and drop it here to group by that column
Herbicide Resistant Redroot Pigweed Globally
(Amaranthus retroflexus)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BrazilBrazil 2011 Cotton atrazine, prometryne, and trifloxysulfuron-Na 5 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5734
2 BrazilBrazil 2012 Cotton pyrithiobac-sodium, and trifloxysulfuron-Na 5 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed5733
3 BrazilBrazil 2014 Cotton, and Soybean fomesafen 5 Inhibition of Protoporphyrinogen Oxidase (E/14)
 		16Amaranthus retroflexusRedroot Pigweed13033
4 BulgariaBulgaria 1984 Corn (maize), Cropland, Grapes, and Orchards atrazine, metribuzin, and simazine 6 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed44
5 BulgariaBulgaria 1984 Cropland linuron 6 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed45
6 Canada (Ontario) CanadaOntario1980 Corn (maize), and Cropland atrazine 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed61
7 Canada (Quebec) CanadaQuebec1980 Corn (maize) atrazine, and metribuzin 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed17126
8 Canada (Ontario) CanadaOntario1998 Corn (maize), Cropland, and Soybean imazethapyr, and thifensulfuron-methyl 7 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed1161
9 Canada (Ontario) CanadaOntario2001 Carrots, and Vegetables linuron 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5125
10 Canada (Quebec) CanadaQuebec2001 Carrots linuron 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5126
11 Canada (Manitoba) CanadaManitoba2002 Wheat florasulam 7 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed5222
12 Canada (Ontario) CanadaOntario2005 Corn (maize) bentazon, and bromoxynil 7 PSII inhibitors - Histidine 215 Binders (C3/6)
 		16Amaranthus retroflexusRedroot Pigweed5473
13 Canada (Quebec) CanadaQuebec2009 Soybean imazethapyr 7 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed17125
14 Canada (Saskatchewan) CanadaSaskatchewan2010 Wheat thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed5628
15 ChinaChina 1990 Cropland atrazine 9 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed1141
16 ChinaChina 2017 Soybean acifluorfen, fluoroglycofen-ethyl, fomesafen, imazethapyr, and lactofen 9 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
 		16Amaranthus retroflexusRedroot Pigweed16078
17 Czech RepublicCzech Republic 1985 Corn (maize), Railways, Roadsides, and Sugar beets atrazine, cyanazine, metamitron, prometryne, terbuthylazine, and terbutryne 12 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed77
18 FranceFrance 1980 Corn (maize) atrazine 17 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed455
19 GermanyGermany 1980 Corn (maize), Railways, and Roadsides atrazine, and fenuron 18 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed370
20 GermanyGermany 2012 Corn (maize) nicosulfuron 18 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed6742
21 GreeceGreece 2000 Potatoes metribuzin 19 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5058
22 IsraelIsrael 1991 Forests chlorsulfuron 23 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed106
23 ItalyItaly 1999 Corn (maize), Soybean, and Sugar beets chloridazon/pyrazon, metamitron, and terbuthylazine 24 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5115
24 ItalyItaly 2003 Soybean imazamox, imazethapyr, nicosulfuron, oxasulfuron, and thifensulfuron-methyl 24 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed5248
25 PolandPoland 1991 Orchards, and Sugar beets atrazine, and metamitron 33 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed164
26 SerbiaSerbia 2002 Soybean imazethapyr 245 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed5216
27 SpainSpain 1986 Corn (maize) atrazine 38 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed187
28 SwitzerlandSwitzerland 1982 Grapes, Orchards, and Vegetables simazine 41 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed199
29 UkraineUkraine 2020 Corn (maize), and Sunflower florasulam, flumetsulam, foramsulfuron, imazamox, imazethapyr, iodosulfuron-methyl-Na, thiencarbazone-methyl, thifensulfuron-methyl, and tribenuron-methyl 230 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed20231
30 United States (Indiana) United StatesIndiana1980 Cropland atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed408
31 United States (Colorado) United StatesColorado1982 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed430
32 United States (Connecticut) United StatesConnecticut1984 Corn (maize) atrazine, and cyanazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed1071
33 United States (New Hampshire) United StatesNew Hampshire1984 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed1078
34 United States (Maine) United StatesMaine1985 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed1092
35 United States (Minnesota) United StatesMinnesota1991 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed245
36 United States (Vermont) United StatesVermont1991 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed1101
37 United States (Virginia) United StatesVirginia1993 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed373
38 United States (Oregon) United StatesOregon1994 Mint terbacil 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed321
39 United States (Arkansas) United StatesArkansas1995 Cropland, and Soybean imazaquin 45 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed402
40 United States (Kansas) United StatesKansas1995 Corn (maize), and Sorghum atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed1039
41 United States (Maryland) United StatesMaryland1998 Unspecified imazaquin, and imazethapyr 45 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed1085
42 United States (Pennsylvania) United StatesPennsylvania1998 Corn (maize), Soybean, and Tomatoes atrazine, chlorimuron-ethyl, cloransulam-methyl, imazamox, imazaquin, imazethapyr, primisulfuron-methyl, and thifensulfuron-methyl 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5021
43 United States (North Dakota) United StatesNorth Dakota1999 Soybean imazethapyr 45 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed5046
44 United States (West Virginia) United StatesWest Virginia2000 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed7773
45 United States (Michigan) United StatesMichigan2001 Asparagus atrazine, and diuron 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5177
46 United States (Idaho) United StatesIdaho2005 Potatoes metribuzin 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5293
47 United States (Washington) United StatesWashington2010 Mint, and Potatoes metribuzin, and terbacil 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		16Amaranthus retroflexusRedroot Pigweed5667
48 United States (Mississippi) United StatesMississippi2010 Railways imazethapyr, pyrithiobac-sodium, and trifloxysulfuron-Na 45 Inhibition of Acetolactate Synthase (B/2)
 		16Amaranthus retroflexusRedroot Pigweed16079
49 United States (North Carolina) United StatesNorth Carolina2020 Soybean fomesafen, imazamethabenz-methyl, lactofen, and thifensulfuron-methyl 45 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
 		16Amaranthus retroflexusRedroot Pigweed22235
50 United States (North Carolina) United StatesNorth Carolina2022 Soybean glyphosate 45 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		16Amaranthus retroflexusRedroot Pigweed24258
51 United States (North Carolina) United StatesNorth Carolina2022 Soybean fomesafen, imazamethabenz-methyl, lactofen, mesotrione, and thifensulfuron-methyl 45 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Protoporphyrinogen Oxidase (E/14)
Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27)
 		16Amaranthus retroflexusRedroot Pigweed24259
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, April 23, 2024 .  Available  www.weedscience.org
Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.