INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

MULTIPLE RESISTANT EASTERN GROUNDSEL
(Senecio vernalis)

Multiple Resistance: 4 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
Phytoene Desaturase inhibitorsHRAC Group 12 (Legacy F1)

Israel
INTRODUCTION EASTERN GROUNDSEL
Eastern Groundsel (Senecio vernalis) is a dicot weed in the Asteraceae family.  In Israel this weed first evolved multiple resistance (to 4 herbicide sites of action) in 2014 and infests Carrots, and Wheat.  Multiple resistance has evolved to herbicides in the Groups 2 (Legacy B), PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2), Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E), and Phytoene Desaturase inhibitors HRAC Group 12 (Legacy F1).  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 2 (Legacy B), PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2), Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E), and Phytoene Desaturase inhibitors HRAC Group 12 (Legacy F1).

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.

 If we do not have a picture for this weed, or you can provide a better picture (scan, digital camera etc) please please e-mail it to us.

QUIK STATS (last updated Apr 28, 2015 )

Common NameEastern Groundsel
SpeciesSenecio vernalis
GroupInhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)

PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)

Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)

Phytoene Desaturase inhibitors HRAC Group 12 (Legacy F1)
Herbicidescarfentrazone-ethyl, diflufenican, diuron, imazamox, and metribuzin
LocationIsrael
Year2014
Situation(s)Carrots, and Wheat
Contributors - (Alphabetically)Maor Matzrafi, and Baruch Rubin 
Edit this Case  |  Add New Case of Resistance  |  Add Note

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 HRAC Group 2, 5, 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

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 multiple resistant Eastern Groundsel from Israel please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  

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: 4 Sites of Action
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
Inhibition of Protoporphyrinogen Oxidase ( HRAC Group 14 (Legacy E)
Phytoene Desaturase inhibitors ( HRAC Group 12 (Legacy F1)
 		327Senecio vernalisEastern Groundsel10993
Literature about Similar Cases

1
Page size:
select
Page: of 0
Items 0 to 0 of 0

1
Page size:
select
Page: of 0
Items 0 to 0 of 0
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.  Wednesday, July 2, 2025 .  Available  www.weedscience.org Copyright © 1993- 2025 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.