International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT WILD MUSTARD
(Sinapis arvensis)


ALS inhibitors (B/2)

United States, North Dakota
INTRODUCTION WILD MUSTARD
Wild Mustard (Sinapis arvensis) is a dicot weed in the Brassicaceae family.  In North Dakota this weed first evolved resistance to Group B/2 herbicides in 1999 and infests Soybean.   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 cloransulam-methyl, imazethapyr, and thifensulfuron-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 Sep 15, 2000 )

Common NameWild Mustard
SpeciesSinapis arvensis
GroupALS inhibitors (B/2)
Herbicidescloransulam-methyl, imazethapyr, and thifensulfuron-methyl
LocationUnited States, North Dakota
Year1999
Situation(s)Soybean
Contributors - (Alphabetically)Mike Christoffers, Kirk Howatt, and Richard Zollinger 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Wild Mustard biotype with this Wild Mustard 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 Wild Mustard 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 Wild Mustard from North Dakota please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

MIKE CHRISTOFFERS
Associate Professor
North Dakota State University
Plant Sciences
Loftsgard Hall 474A
Fargo, 58105, North Dakota
United States
Email Mike Christoffers
Web   : Web Site Link
KIRK HOWATT
Associate Professor
North Dakota State University
Department of Plant Sciences
Loftsgard Hall 470F
Fargo, 58108-6050, North Dakota
United States
Email Kirk Howatt
Web   : Web Site Link
RICHARD ZOLLINGER
Professor and Extension Specialist
North Dakota State University
Plant Sciences
Loftsgard Hall 470H
Fargo, 58105, North Dakota
United States
Email Richard Zollinger
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in North Dakota have been instrumental in providing you this information. Particular thanks is given to Mike Christoffers, Kirk Howatt, and Richard Zollinger for providing detailed information.
Herbicide Resistant Wild Mustard Globally
(Sinapis arvensis)
Herbicide Resistant Wild Mustard Globally
(Sinapis arvensis)
Drag a column header and drop it here to group by that column
Herbicide Resistant Wild Mustard Globally
(Sinapis arvensis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 1996 Wheat chlorsulfuron 1 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard1139
2 Canada (Ontario) CanadaOntario1983 Corn (maize) atrazine 7 Photosystem II inhibitors (C1/5)
158Sinapis arvensisWild Mustard5065
3 Canada (Manitoba) CanadaManitoba1990 Cropland, Spring Barley, and Wheat 2,4-D, dicamba, dichlorprop, MCPA, mecoprop, and picloram 7 Synthetic Auxins (O/4)
158Sinapis arvensisWild Mustard55
4 Canada (Manitoba) CanadaManitoba1992 Canola, Cropland, Spring Barley, and Wheat ethametsulfuron-methyl, and metsulfuron-methyl 7 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard54
5 Canada (Alberta) CanadaAlberta1993 Canola, and Spring Barley ethametsulfuron-methyl, and metsulfuron-methyl 7 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard5036
6 Canada (Manitoba) CanadaManitoba1994 Cropland, Lentils, and Wheat metribuzin 7 Photosystem II inhibitors (C1/5)
158Sinapis arvensisWild Mustard56
7 Canada (Saskatchewan) CanadaSaskatchewan2002 Canola, and Cereals ethametsulfuron-methyl, imazethapyr, thifensulfuron-methyl, and tribenuron-methyl 7 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard5243
8 IranIran 2009 Winter wheat iodosulfuron-methyl-sodium, metsulfuron-methyl, sulfosulfuron, and tribenuron-methyl 79 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard5540
9 ItalyItaly 2006 Durum wheat florasulam, iodosulfuron-methyl-sodium, and tribenuron-methyl 24 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard5677
10 SpainSpain 2011 Cereals iodosulfuron-methyl-sodium, and tribenuron-methyl 38 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard5591
11 TurkeyTurkey 2001 Wheat chlorsulfuron 71 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard5164
12 TurkeyTurkey 2008 Wheat dicamba, propoxycarbazone-sodium, thifensulfuron-methyl, triasulfuron, and tribenuron-methyl 71 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
158Sinapis arvensisWild Mustard5405
13 United States (North Dakota) United StatesNorth Dakota1999 Soybean cloransulam-methyl, imazethapyr, and thifensulfuron-methyl 45 ALS inhibitors (B/2)
158Sinapis arvensisWild Mustard1193
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