International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT COMMON LAMBSQUARTERS
(Chenopodium album)


ALS inhibitors (B/2)

Canada, Saskatchewan
INTRODUCTION COMMON LAMBSQUARTERS
Common Lambsquarters (Chenopodium album) is a dicot weed in the Chenopodiaceae family.  In Saskatchewan this weed first evolved resistance to Group B/2 herbicides in 2009 and infests Spring Barley, and Wheat.   Group B/2 herbicides are known as ALS inhibitors (Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)).  Research has shown that these particular biotypes are resistant to thifensulfuron-methyl, and tribenuron-methyl and they may be cross-resistant to other Group B/2 herbicides.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.

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QUIK STATS (last updated Jan 19, 2014 )

Common NameCommon Lambsquarters
SpeciesChenopodium album
GroupALS inhibitors (B/2)
Herbicidesthifensulfuron-methyl, and tribenuron-methyl
LocationCanada, Saskatchewan
Year2009
Situation(s)Spring Barley, and Wheat
Contributors - (Alphabetically)Hugh Beckie 
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NOTES ABOUT THIS BIOTYPE

OTHER CONTACTS

Hugh Beckie
Haisheng Xie, Ag-Quest

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Common Lambsquarters biotype with this Common Lambsquarters biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on Group B/2 resistant Common Lambsquarters have not been reported to the site.  There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
 
Mechanism of Resistance

The mechanism of resistance for this biotype is either unknown or has not been entered in the database.  If you know anything about the mechanism of resistance for this biotype then please update the database.
 
Relative Fitness

There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes.  If you have any information pertaining to the fitness of Group B/2 resistant Common Lambsquarters from Saskatchewan please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

HUGH BECKIE
Research Scientist
Agriculture & Agri-Food Canada, Science & Technology Branch
Herbicide-Resistant & Novel-Trait Plants
107 Science Place
Saskatoon, S7N 0X2, Saskatchewan
Canada
Email Hugh Beckie

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Saskatchewan have been instrumental in providing you this information. Particular thanks is given to Hugh Beckie for providing detailed information.
Herbicide Resistant Common Lambsquarters Globally
(Chenopodium album)
Herbicide Resistant Common Lambsquarters Globally
(Chenopodium album)
Drag a column header and drop it here to group by that column
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 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters30
2 BulgariaBulgaria 1989 Cropland metribuzin 6 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters47
3 Canada (Ontario) CanadaOntario1973 Corn (maize), and Cropland atrazine 7 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters58
4 Canada (Ontario) CanadaOntario2001 Soybean thifensulfuron-methyl 7 ALS inhibitors (B/2)
47Chenopodium albumCommon Lambsquarters5123
5 Canada (Saskatchewan) CanadaSaskatchewan2009 Spring Barley, and Wheat thifensulfuron-methyl, and tribenuron-methyl 7 ALS inhibitors (B/2)
47Chenopodium albumCommon Lambsquarters5627
6 Czech RepublicCzech Republic 1986 Corn (maize), and Sugar beets atrazine, cyanazine, lenacil, prometon, simazine, terbuthylazine, and terbutryn 12 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters81
7 FinlandFinland 2015 Spring wheat tribenuron-methyl 139 ALS inhibitors (B/2)
47Chenopodium albumCommon Lambsquarters11013
8 FranceFrance 1978 Corn (maize) atrazine 17 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters458
9 GermanyGermany 1980 Corn (maize), and Potatoes simazine 18 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters368
10 GreeceGreece 2000 Potatoes metribuzin 19 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters5059
11 ItalyItaly 1982 Corn (maize) atrazine 24 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters116
12 NetherlandsNetherlands 1980 Corn (maize) atrazine 43 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters217
13 New ZealandNew Zealand 1979 Corn (maize) atrazine 30 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters156
14 New ZealandNew Zealand 2005 Corn (maize) aminopyralid, clopyralid, and dicamba 30 Synthetic Auxins (O/4)
47Chenopodium albumCommon Lambsquarters5389
15 NorwayNorway 1994 Cropland metribuzin 31 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters523
16 NorwayNorway 1994 Cropland linuron 31 PSII inhibitor (Ureas and amides) (C2/7)
47Chenopodium albumCommon Lambsquarters542
17 PolandPoland 1991 Corn (maize), and Sugar beets atrazine, and metamitron 33 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters163
18 PortugalPortugal 2003 Corn (maize) atrazine 34 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters5227
19 SloveniaSlovenia 1996 Corn (maize) atrazine 36 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters371
20 SpainSpain 1987 Corn (maize) atrazine 38 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters186
21 SwedenSweden 2005 Potatoes, and Sugar beets metamitron, and metribuzin 40 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters9928
22 SwitzerlandSwitzerland 1977 Corn (maize) atrazine 41 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters200
23 United KingdomUnited Kingdom 1989 Cropland simazine 44 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters361
24 United States (Michigan) United StatesMichigan1975 Corn (maize), Nurseries, and Soybean atrazine, metribuzin, and simazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters5084
25 United States (New York) United StatesNew York1977 Corn (maize), and Soybean atrazine, cyanazine, and simazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1053
26 United States (Virginia) United StatesVirginia1979 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters274
27 United States (Wisconsin) United StatesWisconsin1979 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters419
28 United States (North Carolina) United StatesNorth Carolina1980 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters261
29 United States (Pennsylvania) United StatesPennsylvania1980 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters263
30 United States (Indiana) United StatesIndiana1980 Corn (maize), and Cropland atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters409
31 United States (Ohio) United StatesOhio1981 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1089
32 United States (Minnesota) United StatesMinnesota1982 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters246
33 United States (Maryland) United StatesMaryland1982 Corn (maize), and Cropland atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters424
34 United States (Massachusetts) United StatesMassachusetts1983 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1095
35 United States (Illinois) United StatesIllinois1985 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters237
36 United States (Maine) United StatesMaine1985 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1091
37 United States (New Hampshire) United StatesNew Hampshire1986 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1077
38 United States (Delaware) United StatesDelaware1988 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters491
39 United States (Iowa) United StatesIowa1989 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters242
40 United States (Vermont) United StatesVermont1991 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1102
41 United States (Connecticut) United StatesConnecticut1992 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1072
42 United States (Rhode Island) United StatesRhode Island1995 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters495
43 United States (Tennessee) United StatesTennessee1998 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters1107
44 United States (West Virginia) United StatesWest Virginia2000 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters7772
45 United States (Michigan) United StatesMichigan2001 Soybean imazamox, and thifensulfuron-methyl 45 ALS inhibitors (B/2)
47Chenopodium albumCommon Lambsquarters5133
46 United States (Ohio) United StatesOhio2001 Soybean thifensulfuron-methyl 45 ALS inhibitors (B/2)
47Chenopodium albumCommon Lambsquarters5232
47 United States (Washington) United StatesWashington2010 Mint, and Potatoes metribuzin, and terbacil 45 Photosystem II inhibitors (C1/5)
47Chenopodium albumCommon Lambsquarters5668
Literature about Similar Cases

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