International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP C1/5 RESISTANT SHEPHERD'S-PURSE
(Capsella bursa-pastoris)


Photosystem II inhibitors (C1/5)

Poland
INTRODUCTION SHEPHERD'S-PURSE
Shepherd's-purse (Capsella bursa-pastoris) is a dicot weed in the Brassicaceae family.  In Poland this weed first evolved resistance to Group C1/5 herbicides in 1984 and infests Orchards.   Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II).  Research has shown that these particular biotypes are resistant to simazine and they may be cross-resistant to other Group C1/5 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 Jun 06, 2000 )

Common NameShepherd's-purse
SpeciesCapsella bursa-pastoris
GroupPhotosystem II inhibitors (C1/5)
Herbicidessimazine
LocationPoland
Year1984
Situation(s)Orchards
Contributors - (Alphabetically)Kazimierz Adamczewski, and Janusz Lipecki 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Ryszard Stanek
Eastern Poland.

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GENERAL

Ryszard Stanek
Before 1984-5 we had problems with another species but it was replaced by Shepherd's purse in 1985. Resistant to other triazines as well.

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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory 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 Group C1/5 resistant Shepherd's-purse 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

Triazine resistant weeds often exhibit a lower relative fitness when compared to susceptible biotypes.  The most common mutation conferring triazine resistance (Ser 264 to Gly mutation of the psbA gene) also causes a reduction in CO2 fixation, quantum yield, and seed and biomass production.  There is no record in this database referring specifically to fitness studies on Group C1/5 resistant Shepherd's-purse from Poland.
 
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CONTRIBUTING WEED SCIENTISTS

KAZIMIERZ ADAMCZEWSKI
Professor
Institute Of Plant Protection - National Research Institute
Depart. Of Weed Science
Str. Wladyslawa Wegorka 20
Poznań, 60-318, Poznań
Poland
Email Kazimierz Adamczewski
JANUSZ LIPECKI
Professor
Agricultural University
Dept. Of Pomology
312 Gray Ave
Lublin, 20-068, Poznań
Poland
Email Janusz Lipecki

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Poland have been instrumental in providing you this information. Particular thanks is given to Kazimierz Adamczewski, and Janusz Lipecki 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 ALS inhibitors (B/2)
41Capsella bursa-pastorisShepherd's-purse5381
2 Canada (Alberta) CanadaAlberta2011 Wheat thifensulfuron-methyl, and tribenuron-methyl 7 ALS inhibitors (B/2)
41Capsella bursa-pastorisShepherd's-purse5623
3 ChinaChina 2009 Winter wheat tribenuron-methyl 9 ALS inhibitors (B/2)
41Capsella bursa-pastorisShepherd's-purse5502
4 DenmarkDenmark 2012 Spring Barley florasulam, and tribenuron-methyl 13 ALS inhibitors (B/2)
41Capsella bursa-pastorisShepherd's-purse8910
5 IsraelIsrael 2000 Roadsides imazapyr 23 ALS inhibitors (B/2)
41Capsella bursa-pastorisShepherd's-purse5465
6 PolandPoland 1984 Orchards simazine 33 Photosystem II inhibitors (C1/5)
41Capsella bursa-pastorisShepherd's-purse166
7 United States (Oregon) United StatesOregon2007 Alfalfa hexazinone, and metribuzin 45 Photosystem II inhibitors (C1/5)
41Capsella bursa-pastorisShepherd's-purse5366
Literature about Similar Cases

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