International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT COMMON GROUNDSEL
(Senecio vulgaris)


ALS inhibitors (B/2)

France
INTRODUCTION COMMON GROUNDSEL
Common Groundsel (Senecio vulgaris) is a dicot weed in the Asteraceae family.  In France this weed first evolved resistance to Group B/2 herbicides in 2009 and infests Grapes, and Wheat.   Group B/2 herbicides are known as ALS inhibitors (Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)).  Research has shown that these particular biotypes are resistant to flazasulfuron, florasulam, imazamox, iodosulfuron-methyl-sodium, mesosulfuron-methyl, metsulfuron-methyl, prosulfuron, thiencarbazone-methyl, and tribenuron-methyl and they may be cross-resistant to other Group B/2 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 Jul 03, 2015 )

Common NameCommon Groundsel
SpeciesSenecio vulgaris
GroupALS inhibitors (B/2)
Herbicidesflazasulfuron, florasulam, imazamox, iodosulfuron-methyl-sodium, mesosulfuron-methyl, metsulfuron-methyl, prosulfuron, thiencarbazone-methyl, and tribenuron-methyl
LocationFrance
Year2009
Situation(s)Grapes, and Wheat
Contributors - (Alphabetically)Christophe Délye 
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NOTES ABOUT THIS BIOTYPE

GENERAL

Christophe Délye

Genetic basis, evolutionary origin and spread of resistance to herbicides inhibiting acetolactate synthase in common groundsel (Senecio vulgaris)

Christophe Délye, Romain Causse and Séverine Michel

Abstract

BACKGROUND: Following control failure by herbicides inhibiting acetolactate synthase (ALS) in French wheat fields and vineyards, we aimed to confirm resistance evolution and investigate the evolutionary origin and spread of resistance in the tetraploid species Senecio vulgaris (common groundsel), a widespread, highly mobile weed.

RESULTS: Sequencing of two ALS homeologues in S. vulgaris enabled the first identification and characterisation of ALS-based resistance in this species. Cross-resistance patterns associated with Leu-197 and Ser-197 ALS1 were established using eight herbicides. Sequencing and genotyping showed that ALS-based resistance evolved by multiple, independent appearances of mutant ALS1 and ALS2 alleles followed by spread. Spread of a mutant ALS1 allele issued from one particular appearance event was observed over 60 km. Independent resistance appearance events and easy seed dispersion are the most likely reasons for populations of S. vulgaris containing different mutant ALS alleles. Accumulation of different alleles probably due to sexual reproduction was observed in the same plant.

CONCLUSION: Mutant ALS alleles and possibly other mechanisms cause resistance to ALS inhibitors in S. vulgaris.  Management strategies should aim at limiting S. vulgaris establishment and seed set. Considering the mobility of this species, control coordination at a regional level is clearly necessary if resistance spread is to be contained.

Pest Management Science 2015.​

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Common Groundsel biotype with this Common 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/2 resistant Common 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

Studies on the mechanism of resistance of Group B/2 resistant Common Groundsel from France 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 B/2 resistant Common Groundsel from France please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

CHRISTOPHE DÉLYE
Chargé De Recherches
Inra
UMR Biologie et Gestion des Adventices
17 rue Sully
Dijon, B.P.86510, Burgundy
France
Email Christophe Délye
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in France have been instrumental in providing you this information. Particular thanks is given to Christophe Délye for providing detailed information.
Herbicide Resistant Common Groundsel Globally
(Senecio vulgaris)
Herbicide Resistant Common Groundsel Globally
(Senecio vulgaris)
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Herbicide Resistant Common Groundsel Globally
(Senecio vulgaris)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 1982 Corn (maize), Fruit, Nurseries, Railways, and Roadsides simazine 3 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel32
2 Canada (Ontario) CanadaOntario1977 Corn (maize) atrazine 7 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel5066
3 Czech RepublicCzech Republic 1988 Orchards, and Railways atrazine, cyanazine, lenacil, prometryn, simazine, terbuthylazine, and terbutryn 12 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel84
4 FranceFrance 1982 Cropland simazine 17 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel468
5 FranceFrance 2009 Grapes, and Wheat flazasulfuron, florasulam, imazamox, iodosulfuron-methyl-sodium, mesosulfuron-methyl, metsulfuron-methyl, prosulfuron, thiencarbazone-methyl, and tribenuron-methyl 17 ALS inhibitors (B/2)
148Senecio vulgarisCommon Groundsel11001
6 GermanyGermany 1980 Orchards atrazine 18 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel448
7 NetherlandsNetherlands 1982 Orchards simazine 43 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel220
8 NorwayNorway 1996 Nurseries simazine 31 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel387
9 SwitzerlandSwitzerland 1982 Grapes simazine 41 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel205
10 SwitzerlandSwitzerland 1987 Vegetables linuron 41 PSII inhibitor (Ureas and amides) (C2/7)
148Senecio vulgarisCommon Groundsel206
11 United KingdomUnited Kingdom 1977 Orchards metribuzin, and simazine 44 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel365
12 United States (Washington) United StatesWashington1970 Nurseries simazine 45 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel386
13 United States (California) United StatesCalifornia1981 Asparagus atrazine 45 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel1037
14 United States (Michigan) United StatesMichigan1990 Blueberries, and Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel5180
15 United States (New York) United StatesNew York1991 Corn (maize) atrazine, and simazine 45 Photosystem II inhibitors (C1/5)
148Senecio vulgarisCommon Groundsel1056
16 United States (Oregon) United StatesOregon1995 Mint bromoxynil 45 PSII inhibitors (Nitriles) (C3/6)
148Senecio vulgarisCommon Groundsel322
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, October 24, 2017 .  Available  www.weedscience.org
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