International Survey of Herbicide-Resistant Weeds

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HRAC GROUP 5 (LEGACY C1 C2) RESISTANT COMMON GROUNDSEL
(Senecio vulgaris)


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

Canada, Ontario
INTRODUCTION COMMON GROUNDSEL
Common Groundsel (Senecio vulgaris) is a dicot weed in the Asteraceae family.  In Ontario this weed first evolved resistance to Group 5 (Legacy C1 C2) herbicides in 1977 and infests Corn (maize).   Group 5 (Legacy C1 C2) herbicides are known as PSII inhibitors - Serine 264 Binders (Inhbition of Photosynthesis at PSll - Serine 264 Binders ).  Research has shown that these particular biotypes are resistant to atrazine and they may be cross-resistant to other Group 5 (Legacy C1 C2) 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 Dec 28, 2000 )

Common NameCommon Groundsel
SpeciesSenecio vulgaris
GroupPSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Herbicidesatrazine
LocationCanada, Ontario
Year1977
Situation(s)Corn (maize)
Contributors - (Alphabetically)Hugh Beckie 
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NOTES ABOUT THIS BIOTYPE

GENERAL

Hugh Beckie
S. I. Warwick. 1980. Differential growth between and within triazine-resistant and triazine-susceptible biotypes of Senecio vulgaris L. Weed Res. 20:299-303.

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse 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 HRAC Group 5 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

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

Researchers have indicated that Group 5/C1 C2 resistant Common Groundsel is ecologically less fit than normal susceptible Common Groundsel.  There may be a note below or an article discussing the fitness of this biotype in the Fact Sheets and Other Literature
 
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CONTRIBUTING WEED SCIENTISTS

HUGH BECKIE
Professor of Crop Weed Science...Canadian Expat
University of Western Australia
Australian Herbicide Resistance Initiative
School of Agriculture and Environment
35 Stirling Highway
Crawley, 6009, Western Australia
Australia
Email Hugh Beckie

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Ontario have been instrumental in providing you this information. Particular thanks is given to Hugh Beckie for providing detailed information.
Herbicide Resistant Common Groundsel Globally
(Senecio vulgaris)
Herbicide Resistant Common Groundsel Globally
(Senecio vulgaris)
Drag a column header and drop it here to group by that column
Herbicide Resistant Common Groundsel Globally
(Senecio vulgaris)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 1982 Corn (maize), Fruit, Nurseries, Railways, and Roadsides simazine 3 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel32
2 Canada (Ontario) CanadaOntario1977 Corn (maize) atrazine 7 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel5066
3 Czech RepublicCzech Republic 1988 Orchards, and Railways atrazine, cyanazine, lenacil, prometryne, simazine, terbuthylazine, and terbutryne 12 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel84
4 FranceFrance 1982 Cropland simazine 17 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel468
5 FranceFrance 2009 Grapes, and Wheat flazasulfuron, florasulam, imazamox, iodosulfuron-methyl-Na, mesosulfuron-methyl, metsulfuron-methyl, prosulfuron, thiencarbazone-methyl, and tribenuron-methyl 17 Inhibition of Acetolactate Synthase (B/2)
148Senecio vulgarisCommon Groundsel11001
6 GermanyGermany 1980 Orchards atrazine 18 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel448
7 NetherlandsNetherlands 1982 Orchards simazine 43 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel220
8 NorwayNorway 1996 Nurseries simazine 31 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel387
9 SwitzerlandSwitzerland 1982 Grapes simazine 41 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel205
10 SwitzerlandSwitzerland 1987 Vegetables linuron 41 PSII inhibitors - Serine 264 Binders (C1 C2/7)
148Senecio vulgarisCommon Groundsel206
11 United KingdomUnited Kingdom 1977 Orchards metribuzin, and simazine 44 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel365
12 United States (Washington) United StatesWashington1970 Nurseries simazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel386
13 United States (California) United StatesCalifornia1981 Asparagus atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel1037
14 United States (Michigan) United StatesMichigan1990 Blueberries, and Corn (maize) atrazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel5180
15 United States (New York) United StatesNew York1991 Corn (maize) atrazine, and simazine 45 PSII inhibitors - Serine 264 Binders (C1 C2/5)
148Senecio vulgarisCommon Groundsel1056
16 United States (Oregon) United StatesOregon1995 Mint bromoxynil 45 PSII inhibitors - Histidine 215 Binders (C3/6)
148Senecio vulgarisCommon Groundsel322
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