INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Common Lambsquarters Globally
(Chenopodium album)
Herbicide Resistant Common Lambsquarters Globally
(Chenopodium album)
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Herbicide Resistant Common Lambsquarters Globally
(Chenopodium album)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 1980 Corn (maize), Potatoes, Roadsides, and Sugar beets atrazine, metamitron, and metribuzin 3 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters30
2 BulgariaBulgaria 1989 Cropland metribuzin 6 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters47
3 Canada (Ontario) CanadaOntario1973 Corn (maize), and Cropland atrazine 7 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters58
4 Canada (Quebec) CanadaQuebec1980 Corn (maize) atrazine 7 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters17132
5 Canada (Ontario) CanadaOntario2001 Soybean thifensulfuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters5123
6 Canada (Quebec) CanadaQuebec2008 Soybean thifensulfuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters17131
7 Canada (Saskatchewan) CanadaSaskatchewan2009 Spring Barley, and Wheat thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters5627
8 Canada (Prince Edward Island) CanadaPrince Edward Island2018 Potatoes metribuzin 7 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters28273
9 Canada (New Brunswick) CanadaNew Brunswick2018 Potatoes metribuzin 7 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters28276
10 Czech RepublicCzech Republic 1986 Corn (maize), and Sugar beets atrazine, cyanazine, lenacil, metamitron, prometon, simazine, terbuthylazine, and terbutryne 12 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters81
11 FinlandFinland 2015 Spring wheat tribenuron-methyl 139 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters11013
12 FranceFrance 1978 Corn (maize) atrazine, metamitron, and metribuzin 17 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters458
13 GermanyGermany 1980 Corn (maize), and Potatoes simazine 18 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters368
14 GreeceGreece 2000 Potatoes metribuzin 19 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters5059
15 ItalyItaly 1982 Corn (maize) atrazine 24 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters116
16 NetherlandsNetherlands 1980 Corn (maize) atrazine 43 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters217
17 New ZealandNew Zealand 1979 Corn (maize) atrazine 30 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters156
18 New ZealandNew Zealand 2005 Corn (maize) aminopyralid, clopyralid, and dicamba 30 Auxin Mimics HRAC Group 4 (Legacy O)
 		47Chenopodium albumCommon Lambsquarters5389
19 NorwayNorway 1994 Cropland metribuzin 31 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters523
20 NorwayNorway 1994 Cropland linuron 31 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters542
21 PolandPoland 1991 Corn (maize), and Sugar beets atrazine, and metamitron 33 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters163
22 PortugalPortugal 2003 Corn (maize) atrazine 34 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters5227
23 SloveniaSlovenia 1996 Corn (maize) atrazine 36 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters371
24 SpainSpain 1987 Corn (maize) atrazine 38 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters186
25 SwedenSweden 2005 Potatoes, and Sugar beets metamitron, and metribuzin 40 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters9928
26 SwitzerlandSwitzerland 1977 Corn (maize) atrazine 41 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters200
27 UkraineUkraine 2022 Corn (maize), Soybean, Sunflower, and Wheat florasulam, flumetsulam, imazamox, iodosulfuron-methyl-Na, thiencarbazone-methyl, thifensulfuron-methyl, and tribenuron-methyl 230 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters24250
28 United KingdomUnited Kingdom 1989 Cropland simazine 44 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters361
29 United States (Michigan) United StatesMichigan1975 Corn (maize), Nurseries, and Soybean atrazine, metribuzin, and simazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters5084
30 United States (New York) United StatesNew York1977 Corn (maize), and Soybean atrazine, cyanazine, and simazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1053
31 United States (Virginia) United StatesVirginia1979 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters274
32 United States (Wisconsin) United StatesWisconsin1979 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters419
33 United States (North Carolina) United StatesNorth Carolina1980 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters261
34 United States (Pennsylvania) United StatesPennsylvania1980 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters263
35 United States (Indiana) United StatesIndiana1980 Corn (maize), and Cropland atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters409
36 United States (Ohio) United StatesOhio1981 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1089
37 United States (Minnesota) United StatesMinnesota1982 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters246
38 United States (Maryland) United StatesMaryland1982 Corn (maize), and Cropland atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters424
39 United States (Massachusetts) United StatesMassachusetts1983 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1095
40 United States (Illinois) United StatesIllinois1985 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters237
41 United States (Maine) United StatesMaine1985 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1091
42 United States (New Hampshire) United StatesNew Hampshire1986 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1077
43 United States (Delaware) United StatesDelaware1988 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters491
44 United States (Iowa) United StatesIowa1989 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters242
45 United States (Vermont) United StatesVermont1991 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1102
46 United States (Connecticut) United StatesConnecticut1992 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1072
47 United States (Rhode Island) United StatesRhode Island1995 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters495
48 United States (Tennessee) United StatesTennessee1998 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters1107
49 United States (West Virginia) United StatesWest Virginia2000 Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters7772
50 United States (Michigan) United StatesMichigan2001 Soybean imazamox, and thifensulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters5133
51 United States (Ohio) United StatesOhio2001 Soybean thifensulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		47Chenopodium albumCommon Lambsquarters5232
52 United States (Washington) United StatesWashington2010 Mint, and Potatoes metribuzin, and terbacil 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		47Chenopodium albumCommon Lambsquarters5668
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