International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 9 (LEGACY G) RESISTANT BIRDSRAPE MUSTARD
(Brassica rapa (=B. campestris))


Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)

Canada, Quebec
INTRODUCTION BIRDSRAPE MUSTARD
Birdsrape Mustard (Brassica rapa (=B. campestris)) is a dicot weed in the Brassicaceae family.  In Quebec this weed first evolved resistance to Group 9 (Legacy G) herbicides in 2017 and infests Corn (maize), and Soybean.   Group 9 (Legacy G) herbicides are known as Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (Inhibition of EPSP synthase).  Research has shown that these particular biotypes are resistant to glyphosate and they may be cross-resistant to other Group 9 (Legacy G) 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 28, 2018 )

Common NameBirdsrape Mustard
SpeciesBrassica rapa (=B. campestris)
GroupInhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
Herbicidesglyphosate
LocationCanada, Quebec
Year2017
Situation(s)Corn (maize), and Soybean
Contributors - (Alphabetically)Martin Laforest, and Marie-Josée Simard 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Birdsrape Mustard biotype with this Birdsrape 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 HRAC Group 9 resistant Birdsrape 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 9 (Legacy G) resistant Birdsrape Mustard from Quebec please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

MARTIN LAFOREST
Research Scientist
Agriculture and Agri-food Canada
430 boul. Gouin
St-Jean-sur-Richelieju, J3B 3E6, Quebec
Canada
Email Martin Laforest
MARIE-JOSÉE SIMARD
Weed scientist
Agriculture and Agri-Food Canada
Saint-Jean-sur-Richelieu research centre
430 Gouin
Saint-Jean-sur-Richelieu, J3B 3E6, Quebec
Canada
Email Marie-Josée Simard
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Quebec have been instrumental in providing you this information. Particular thanks is given to Martin Laforest, and Marie-Josée Simard for providing detailed information.
Herbicide Resistant Birdsrape Mustard Globally
(Brassica rapa (=B. campestris))
Herbicide Resistant Birdsrape Mustard Globally
(Brassica rapa (=B. campestris))
Drag a column header and drop it here to group by that column
Herbicide Resistant Birdsrape Mustard Globally
(Brassica rapa (=B. campestris))
#CountryFirstYearSituationActive IngredientsSite of Action
1 ArgentinaArgentina 2012 Soybean, and Wheat diclosulam, glyphosate, imazapyr, and metsulfuron-methyl 48 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase ( HRAC Group 9 (Legacy G)
36Brassica rapa (=B. campestris)Birdsrape Mustard17120
2 ArgentinaArgentina 2015 Soybean, Wheat, and Winter barley 2,4-D 48 Auxin Mimics ( HRAC Group 4 (Legacy O)
36Brassica rapa (=B. campestris)Birdsrape Mustard18175
3 Canada (Quebec) CanadaQuebec1977 Corn (maize) atrazine 7 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
36Brassica rapa (=B. campestris)Birdsrape Mustard433
4 Canada (Quebec) CanadaQuebec2017 Corn (maize), and Soybean glyphosate 7 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase ( HRAC Group 9 (Legacy G)
36Brassica rapa (=B. campestris)Birdsrape Mustard17130
Literature about Similar Cases

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