International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 1 (LEGACY A) RESISTANT GREEN FOXTAIL
(Setaria viridis)


Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)

Canada, Saskatchewan
INTRODUCTION BLACKGRASS
Blackgrass (Alopecurus myosuroides) is a monocot weed in the Poaceae family.  In Belgium this weed first evolved multiple resistance (to 4 herbicide sites of action) in 1996 and infests Canola, Cropland, Spring Barley, and Wheat.  Multiple resistance has evolved to herbicides in the Groups 1 (Legacy A), Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B), PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2), and Inhibition of Microtubule Assembly 2 HRAC Group 3 (Legacy K1).  These particular biotypes are known to have resistance to fenoxaprop-ethyl, and sethoxydim and they may be cross-resistant to other herbicides in the Groups 1 (Legacy A), Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B), PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2), and Inhibition of Microtubule Assembly 2 HRAC Group 3 (Legacy K1).

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 Nov 21, 2000 )

Common NameBlackgrass
SpeciesAlopecurus myosuroides
GroupInhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)

Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)

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

Inhibition of Microtubule Assembly 2 HRAC Group 3 (Legacy K1)
Herbicidesfenoxaprop-ethyl, and sethoxydim
LocationBelgium
Year1996
Situation(s)Canola, Cropland, Spring Barley, and Wheat
Contributors - (Alphabetically)Hugh Beckie 
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NOTES ABOUT THIS BIOTYPE

GENERAL

Hugh Beckie
Beckie, H. J., A. G. Thomas, and A. Légère. 1999. Nature, occurrence, and cost of herbicide-resistant green foxtail (Setaria viridis) across Saskatchewan ecoregions. Weed Technol. 13:626-631.

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Blackgrass biotype with this Blackgrass 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 1, 2, 5, 3 resistant Blackgrass 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 multiple resistant Blackgrass from Belgium 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 multiple resistant Blackgrass from Belgium please update the database.
 
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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 Belgium have been instrumental in providing you this information. Particular thanks is given to Hugh Beckie for providing detailed information.
Herbicide Resistant Green Foxtail Globally
(Setaria viridis)
Herbicide Resistant Green Foxtail Globally
(Setaria viridis)
Drag a column header and drop it here to group by that column
Herbicide Resistant Green Foxtail Globally
(Setaria viridis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Canada (Manitoba) CanadaManitoba1988 Canola, Cropland, Spring Barley, and Wheat ethalfluralin, and trifluralin 7 Inhibition of Microtubule Assembly 2 (K1/3)
153Setaria viridisGreen Foxtail52
2 Canada (Alberta) CanadaAlberta1989 Canola, Peas, Spring Barley, and Wheat ethalfluralin, and trifluralin 7 Inhibition of Microtubule Assembly 2 (K1/3)
153Setaria viridisGreen Foxtail5071
3 Canada (Manitoba) CanadaManitoba1991 Canola, Cropland, Spring Barley, and Wheat diclofop-methyl, fenoxaprop-ethyl, sethoxydim, and tralkoxydim 7 Inhibition of Acetyl CoA Carboxylase (A/1)
153Setaria viridisGreen Foxtail53
4 Canada (Saskatchewan) CanadaSaskatchewan1991 Canola, Flax, Spring Barley, and Wheat ethalfluralin, and trifluralin 7 Inhibition of Microtubule Assembly 2 (K1/3)
153Setaria viridisGreen Foxtail5040
5 Canada (Manitoba) CanadaManitoba1992 Canola, Flax, Spring Barley, and Wheat diclofop-methyl, ethalfluralin, fenoxaprop-ethyl, sethoxydim, tralkoxydim, and trifluralin 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Microtubule Assembly 2 (K1/3)
153Setaria viridisGreen Foxtail5037
6 Canada (Saskatchewan) CanadaSaskatchewan1996 Canola, Cropland, Spring Barley, and Wheat fenoxaprop-ethyl, and sethoxydim 7 Inhibition of Acetyl CoA Carboxylase (A/1)
153Setaria viridisGreen Foxtail5038
7 Canada (Alberta) CanadaAlberta1996 Wheat diclofop-methyl, fenoxaprop-ethyl, and sethoxydim 7 Inhibition of Acetyl CoA Carboxylase (A/1)
153Setaria viridisGreen Foxtail5039
8 Canada (Saskatchewan) CanadaSaskatchewan1996 Canola, Peas, Spring Barley, and Wheat fenoxaprop-ethyl, and trifluralin 7 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Microtubule Assembly 2 (K1/3)
153Setaria viridisGreen Foxtail5070
9 Canada (Ontario) CanadaOntario2001 Corn (maize), and Soybean flucarbazone-Na, imazethapyr, nicosulfuron, and pyrithiobac-sodium 7 Inhibition of Acetolactate Synthase (B/2)
153Setaria viridisGreen Foxtail5124
10 Canada (Manitoba) CanadaManitoba2002 Wheat imazethapyr, and sulfosulfuron 7 Inhibition of Acetolactate Synthase (B/2)
153Setaria viridisGreen Foxtail5221
11 FranceFrance 1982 Corn (maize) atrazine 17 PSII inhibitors - Serine 264 Binders (C1 C2/5)
153Setaria viridisGreen Foxtail470
12 FranceFrance 2011 Corn (maize) foramsulfuron, and nicosulfuron 17 Inhibition of Acetolactate Synthase (B/2)
153Setaria viridisGreen Foxtail9933
13 SpainSpain 1987 Corn (maize) atrazine 38 PSII inhibitors - Serine 264 Binders (C1 C2/5)
153Setaria viridisGreen Foxtail178
14 United States (North Dakota) United StatesNorth Dakota1989 Sunflower, and Wheat trifluralin 45 Inhibition of Microtubule Assembly 2 (K1/3)
153Setaria viridisGreen Foxtail493
15 United States (Wisconsin) United StatesWisconsin1999 Corn (maize), and Soybean imazamox 45 Inhibition of Acetolactate Synthase (B/2)
153Setaria viridisGreen Foxtail1172
16 United States (Montana) United StatesMontana2005 Canola, Peas, Spring Barley, and Wheat diclofop-methyl, fenoxaprop-ethyl, fluazifop-butyl, pinoxaden, and sethoxydim 45 Inhibition of Acetyl CoA Carboxylase (A/1)
153Setaria viridisGreen Foxtail7804
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