International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT FIELD PENNYCRESS
(Thlaspi arvense)


ALS inhibitors (B/2)

Canada, Saskatchewan
INTRODUCTION FIELD PENNYCRESS
Field Pennycress (Thlaspi arvense) is a dicot weed in the Brassicaceae family.  In Saskatchewan this weed first evolved resistance to Group B/2 herbicides in 2009 and infests 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 May 02, 2012 )

Common NameField Pennycress
SpeciesThlaspi arvense
GroupALS inhibitors (B/2)
Herbicidesthifensulfuron-methyl, and tribenuron-methyl
LocationCanada, Saskatchewan
Year2009
Situation(s)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 Field Pennycress biotype with this Field Pennycress 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 Field Pennycress 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 Field Pennycress 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 Field Pennycress Globally
(Thlaspi arvense)
Herbicide Resistant Field Pennycress Globally
(Thlaspi arvense)
Drag a column header and drop it here to group by that column
Herbicide Resistant Field Pennycress Globally
(Thlaspi arvense)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Canada (Alberta) CanadaAlberta2001 Canola, Peas, Spring Barley, and Wheat ethametsulfuron-methyl, imazethapyr, metsulfuron-methyl, and thifensulfuron-methyl 7 ALS inhibitors (B/2)
204Thlaspi arvenseField Pennycress5097
2 Canada (Manitoba) CanadaManitoba2008 Wheat thifensulfuron-methyl, and tribenuron-methyl 7 ALS inhibitors (B/2)
204Thlaspi arvenseField Pennycress5624
3 Canada (Saskatchewan) CanadaSaskatchewan2009 Wheat thifensulfuron-methyl, and tribenuron-methyl 7 ALS inhibitors (B/2)
204Thlaspi arvenseField Pennycress5626
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Saturday, September 23, 2017 .  Available  www.weedscience.org
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