INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 2 (LEGACY B) RESISTANT SHEPHERD'S-PURSE
(Capsella bursa-pastoris)

Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)

China, Henan province
INTRODUCTION SHEPHERD'S-PURSE
Shepherd's-purse (Capsella bursa-pastoris) is a dicot weed in the Brassicaceae family.  In China this weed first evolved resistance to Group 2 (Legacy B) herbicides in 2009 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 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 Apr 12, 2012 )

Common NameShepherd's-purse
SpeciesCapsella bursa-pastoris
GroupInhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Herbicidestribenuron-methyl
LocationChina, Henan province
Year2009
Situation(s)Winter wheat
Contributors - (Alphabetically)Tao Jin, Junliang Liu, Jian Sun, Jinxin Wang, and Huan Zhibo 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Shepherd's-purse biotype with this Shepherd's-purse 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 Shepherd's-purse indicate that the inheritance is determined by a one gene, dominant, nuclear trait.  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 Shepherd's-purse from China 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 Shepherd's-purse from China please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

TAO JIN
Shandong Agricultural University
College Of Plant Protection
Daizong Road 61#
Tai'an, 271018
China
Email Tao Jin
JUNLIANG LIU
Shandong Agricultural University
College Of Plant Protection
Daizong Road 61#
Tai¡¯an, 271018
China
Email Junliang Liu
JIAN SUN
Shandong Agricultural University
College Of Plant Protection
Daizong Road 61#
Tai'an, 271018
China
Email Jian Sun
JINXIN WANG
Professor
Shandong Agricultural University
College Of Plant Protection
Daizong Road 61#
Tai'an, 271018, Shandong
China
Email Jinxin Wang
HUAN ZHIBO
Weed Resistance
Shandong Agriculture University
Plant Protection College
No.61 Daizong Street
Taian, 271018, Shandong
China
Email Huan Zhibo

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in China have been instrumental in providing you this information. Particular thanks is given to Tao Jin, Junliang Liu, Jian Sun, Jinxin Wang, and Huan Zhibo for providing detailed information.
Herbicide Resistant Shepherd's-purse Globally
(Capsella bursa-pastoris)
Herbicide Resistant Shepherd's-purse Globally
(Capsella bursa-pastoris)
Drag a column header and drop it here to group by that column
Herbicide Resistant Shepherd's-purse Globally
(Capsella bursa-pastoris)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Canada (Saskatchewan) CanadaSaskatchewan2008 Wheat imazamox, imazethapyr, thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		41Capsella bursa-pastorisShepherd's-purse5381
2 Canada (Alberta) CanadaAlberta2011 Wheat thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		41Capsella bursa-pastorisShepherd's-purse5623
3 ChinaChina 2009 Winter wheat tribenuron-methyl 9 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		41Capsella bursa-pastorisShepherd's-purse5502
4 DenmarkDenmark 2012 Spring Barley florasulam, and tribenuron-methyl 13 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		41Capsella bursa-pastorisShepherd's-purse8910
5 IsraelIsrael 2000 Roadsides imazapyr 23 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		41Capsella bursa-pastorisShepherd's-purse5465
6 NorwayNorway 2019 Wheat iodosulfuron-methyl-Na 31 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
 		41Capsella bursa-pastorisShepherd's-purse18169
7 PolandPoland 1984 Orchards simazine 33 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
 		41Capsella bursa-pastorisShepherd's-purse166
8 United States (Oregon) United StatesOregon2007 Alfalfa hexazinone, and metribuzin 45 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
 		41Capsella bursa-pastorisShepherd's-purse5366
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