INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

INTRODUCTION EASTERN GROUNDSEL
Eastern Groundsel (Senecio vernalis) is a dicot weed in the Asteraceae family.  In Israel this weed first evolved multiple resistance (to 5 herbicide sites of action) in 2014 and infests Carrots, and Wheat.  Multiple resistance has evolved to herbicides in the Groups B/2, C1/5, C2/7, E/14, and F1/12.  These particular biotypes are known to have resistance to carfentrazone-ethyl, diflufenican, diuron, imazamox, and metribuzin and they may be cross-resistant to other herbicides in the Groups B/2, C1/5, C2/7, E/14, and F1/12.

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 28, 2015 )

Common NameEastern Groundsel
SpeciesSenecio vernalis
GroupALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
PSII inhibitor (Ureas and amides) (C2/7)
PPO inhibitors (E/14)
Carotenoid biosynthesis inhibitors (F1/12)
Herbicidescarfentrazone-ethyl, diflufenican, diuron, imazamox, and metribuzin
LocationIsrael
Year2014
Situation(s)Carrots, and Wheat
Contributors - (Alphabetically)Maor Matzrafi, and Baruch Rubin 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Eastern Groundsel biotype with this Eastern Groundsel 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, C1, C2, E, F1/2, 5, 7, 14, 12 resistant Eastern Groundsel 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 multiple resistant Eastern Groundsel from Israel.
 
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CONTRIBUTING WEED SCIENTISTS

MAOR MATZRAFI
Postdoctral Researcher
University of California
Department of Plant Sciences
MS 4
Davis, 95616
Israel
Email Maor Matzrafi
BARUCH RUBIN
Professor
Hebrew University Of Jerusalem
Inst. Plant Sci. & Genetics In Agriculture
Faculty Of Agric.
Food & Environm.
Rehovot, 76100, Israel
Israel
Email Baruch Rubin

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Israel have been instrumental in providing you this information. Particular thanks is given to Maor Matzrafi, and Baruch Rubin for providing detailed information.
Herbicide Resistant Eastern Groundsel Globally
(Senecio vernalis)
Herbicide Resistant Eastern Groundsel Globally
(Senecio vernalis)
Drag a column header and drop it here to group by that column
Herbicide Resistant Eastern Groundsel Globally
(Senecio vernalis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 IsraelIsrael 2014 Carrots, and Wheat carfentrazone-ethyl, diflufenican, diuron, imazamox, and metribuzin 23 Multiple Resistance: 5 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
PSII inhibitor (Ureas and amides) (C2/7)
PPO inhibitors (E/14)
Carotenoid biosynthesis inhibitors (F1/12)
 		327Senecio vernalisEastern Groundsel10993
Literature about Similar Cases

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PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site. Citation:
Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Saturday, August 8, 2020 .  Available  www.weedscience.org Copyright © 1993- 2020 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.