INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 2 (LEGACY B) RESISTANT BUSHY WALLFLOWER
(Erysimum repandum)

Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)

United States, Kansas
INTRODUCTION BUSHY WALLFLOWER
Bushy Wallflower (Erysimum repandum) is a dicot weed in the Brassicaceae family.  In Kansas this weed first evolved resistance to Group 2 (Legacy B) herbicides in 2005 and infests Winter wheat.   Group 2 (Legacy B) herbicides are known as Inhibition of Acetolactate Synthase (Inhibition of Acetolactate Synthase ).  Research has shown that these particular biotypes are resistant to chlorsulfuron, imazamox, metsulfuron-methyl, propoxycarbazone-Na, sulfosulfuron, triasulfuron, and tribenuron-methyl and they may be cross-resistant to other Group 2 (Legacy B) 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 25, 2011 )

Common NameBushy Wallflower
SpeciesErysimum repandum
GroupInhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Herbicideschlorsulfuron, imazamox, metsulfuron-methyl, propoxycarbazone-Na, sulfosulfuron, triasulfuron, and tribenuron-methyl
LocationUnited States, Kansas
Year2005
Situation(s)Winter wheat
Contributors - (Alphabetically)Dallas Peterson 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Bushy Wallflower biotype with this Bushy Wallflower 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 2 resistant Bushy Wallflower 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

Studies on the mechanism of resistance of Group 2 (Legacy B) resistant Bushy Wallflower from Kansas indicate that resistance is due to an altered target site.  There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature
 
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 2 (Legacy B) resistant Bushy Wallflower from Kansas please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

DALLAS PETERSON
Professor and Extension Weed Specialist
Kansas State University
Department of Agronomy
3703 Throckmorton Plant Sciences Center
1712 Claflin Road
Manhattan, KS 66506-0110, Kansas
United States
Email Dallas Peterson
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Kansas have been instrumental in providing you this information. Particular thanks is given to Dallas Peterson for providing detailed information.
Herbicide Resistant Bushy Wallflower Globally
(Erysimum repandum)
Herbicide Resistant Bushy Wallflower Globally
(Erysimum repandum)
Drag a column header and drop it here to group by that column
Herbicide Resistant Bushy Wallflower Globally
(Erysimum repandum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 United States (Kansas) United StatesKansas2005 Winter wheat chlorsulfuron, imazamox, metsulfuron-methyl, propoxycarbazone-Na, sulfosulfuron, triasulfuron, and tribenuron-methyl 45 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		247Erysimum repandumBushy Wallflower5448
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HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Sunday, October 18, 2026.  Available at  www.weedscience.org

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