INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

MULTIPLE RESISTANT BLACKGRASS
(Alopecurus myosuroides)


Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)

Sweden
INTRODUCTION BLACKGRASS
Blackgrass (Alopecurus myosuroides) is a monocot weed in the Poaceae family.  In Sweden this weed first evolved multiple resistance (to 2 herbicide sites of action) in 2014 and infests Spring wheat, Winter barley, and Winter wheat.  Multiple resistance has evolved to herbicides in the Groups 1 (Legacy A), and Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B).  These particular biotypes are known to have resistance to cycloxydim, fenoxaprop-ethyl, flupyrsulfuron-methyl-Na, iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam and they may be cross-resistant to other herbicides in the Groups 1 (Legacy A), and Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B).

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 May 12, 2015 )

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

Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Herbicidescycloxydim, fenoxaprop-ethyl, flupyrsulfuron-methyl-Na, iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam
LocationSweden
Year2014
Situation(s)Spring wheat, Winter barley, and Winter wheat
Contributors - (Alphabetically)Henrik Hallquist, and Solvejg Mathiassen 
Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE

GENERAL

Henrik Hallquist

Status for resistance in Alopecuros myosuroides in Sweden

Results of survey 2014.  

2014: Fifteen field collected Swedish seed samples of Alopecurus myosuroides were tested for resistance to seven herbicides (4 doses of each) in two pot experiments in a glasshouse. The susceptibility of the field samples was compared to two susceptible and one resistant reference populations. Seven populations were susceptible to all herbicides included in the study. Eight populations showed  resistance to fenoxaprop. Four of these populations were resistant to cycloxydim as well indicating an altered target site as the resistance mechanism. Two of these four populations were resistant to both cycloxydim, fenoxaprop and flupyrsulfuron indicating that two resistance mechanisms (TSR ACCase and enhanced metabolism) may be present. The responses of another 5 populations indicated enhanced metabolism with low effects of flupyrsulfuron and fenoxaprop. All populations were susceptible to flufenacet+flurtamone+diflufenican and prosulfocarb and all except one population were susceptible to iodosulfuron+mososulfuron and pyroxsulam+florosulam. This is the first finding of an A. myosuroides population in Sweden showing resistance to iodosulfuron+mososulfuron and pyroxsulam+florosulam.

Edit this Note  |  Add New Note
 

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 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

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 Blackgrass from Sweden please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  

CONTRIBUTING WEED SCIENTISTS

HENRIK HALLQUIST
Weed Advisor
Swedish Board of Agriculture
Box 12
Alnarp, 23053, Skåne County
Sweden
Email Henrik Hallquist
SOLVEJG MATHIASSEN
Senior Scientist
Aarhus University, Science and Technology
Dept. of Agroecology
P.o. Box 30
Slagelse, 4200, Slagelse Municipality
Denmark
Email Solvejg Mathiassen

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Sweden have been instrumental in providing you this information. Particular thanks is given to Henrik Hallquist, and Solvejg Mathiassen for providing detailed information.
Herbicide Resistant Blackgrass Globally
(Alopecurus myosuroides)
Herbicide Resistant Blackgrass Globally
(Alopecurus myosuroides)
Drag a column header and drop it here to group by that column
Herbicide Resistant Blackgrass Globally
(Alopecurus myosuroides)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 1996 Winter wheat clodinafop-propargyl, and fenoxaprop-ethyl 3 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass501
2 BelgiumBelgium 1996 Wheat isoproturon 3 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass502
3 BelgiumBelgium 1996 Winter wheat atrazine, chlorotoluron, clodinafop-propargyl, fenoxaprop-ethyl, flupyrsulfuron-methyl-Na, pendimethalin, and propaquizafop 3 Multiple Resistance: 4 Sites of Action
Inhibition 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 ( HRAC Group 3 (Legacy K1)
6Alopecurus myosuroidesBlackgrass5043
4 Czech RepublicCzech Republic 2008 Wheat chlorsulfuron 12 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass7871
5 DenmarkDenmark 2001 Winter wheat fenoxaprop-ethyl 13 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass5347
6 DenmarkDenmark 2001 Winter wheat clodinafop-propargyl, cycloxydim, fenoxaprop-ethyl, florasulam, flupyrsulfuron-methyl-Na, iodosulfuron-methyl-Na, mesosulfuron-methyl, pendimethalin, and pyroxsulam 13 Multiple Resistance: 3 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
Inhibition of Microtubule Assembly ( HRAC Group 3 (Legacy K1)
6Alopecurus myosuroidesBlackgrass5675
7 FranceFrance 1993 Wheat clodinafop-propargyl, cycloxydim, diclofop-methyl, fenoxaprop-ethyl, haloxyfop-methyl, and sethoxydim 17 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass546
8 FranceFrance 2003 Wheat clodinafop-propargyl, diclofop-methyl, fenoxaprop-ethyl, iodosulfuron-methyl-Na, mesosulfuron-methyl, and sethoxydim 17 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass17116
9 FranceFrance 2006 Wheat imazamethabenz-methyl, iodosulfuron-methyl-Na, and mesosulfuron-methyl 17 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass5329
10 GermanyGermany 1983 Sugar beets, and Wheat chlorotoluron, fenoxaprop-ethyl, and isoproturon 18 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass369
11 GermanyGermany 2001 Wheat flupyrsulfuron-methyl-Na 18 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass5154
12 GermanyGermany 2003 Sugar beets, and Winter wheat clethodim, cycloxydim, fenoxaprop-ethyl, and fluazifop-butyl 18 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass5237
13 GermanyGermany 2007 Wheat chlorotoluron, fenoxaprop-ethyl, flufenacet, isoproturon, mesosulfuron-methyl, and pinoxaden 18 Multiple Resistance: 4 Sites of Action
Inhibition 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)
Very Long-Chain Fatty Acid Synthesis inhibitors ( HRAC Group 15 (Legacy K3 N)
6Alopecurus myosuroidesBlackgrass5361
14 GermanyGermany 2009 Cereals cycloxydim, fenoxaprop-ethyl, flupyrsulfuron-methyl-Na, mesosulfuron-methyl, and pinoxaden 18 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass5536
15 IrelandIreland 2021 Wheat cycloxydim, iodosulfuron-methyl-Na, mesosulfuron-methyl, and propaquizafop 81 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass21236
16 IsraelIsrael 1979 Roadsides methabenzthiazuron 23 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass94
17 ItalyItaly 2009 Durum wheat clodinafop-propargyl, fenoxaprop-ethyl, and pinoxaden 24 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass5681
18 NetherlandsNetherlands 1989 Wheat chlorotoluron 43 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass221
19 NetherlandsNetherlands 1996 Winter wheat chlorotoluron, clodinafop-propargyl, fenoxaprop-ethyl, and isoproturon 43 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass5082
20 NetherlandsNetherlands 1999 Winter wheat clodinafop-propargyl, cycloxydim, fenoxaprop-ethyl, and penoxsulam 43 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass5083
21 NetherlandsNetherlands 2010 Winter wheat florasulam, iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam 43 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass10978
22 PolandPoland 2010 Winter wheat iodosulfuron-methyl-Na, and mesosulfuron-methyl 33 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass5620
23 PolandPoland 2011 Winter wheat fenoxaprop-ethyl, and pinoxaden 33 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass6760
24 PolandPoland 2012 Winter wheat fenoxaprop-ethyl, iodosulfuron-methyl-Na, mesosulfuron-methyl, pinoxaden, and sulfometuron-methyl 33 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass10969
25 SpainSpain 1991 Wheat chlorotoluron 38 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass188
26 SpainSpain 2015 Canola, Faba beans, Peas, Wheat, and Winter barley chlorotoluron, clodinafop-propargyl, cloransulam-methyl, iodosulfuron-methyl-Na, isoproturon, mesosulfuron-methyl, and pinoxaden 38 Multiple Resistance: 3 Sites of Action
Inhibition 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)
6Alopecurus myosuroidesBlackgrass11014
27 SwedenSweden 2011 Winter wheat clodinafop-propargyl, cycloxydim, and fenoxaprop-ethyl 40 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass8911
28 SwedenSweden 2011 Wheat fenoxaprop-ethyl, flupyrsulfuron-methyl-Na, prosulfocarb, and pyroxsulam 40 Multiple Resistance: 3 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
Very Long-Chain Fatty Acid Synthesis inhibitors ( HRAC Group 15 (Legacy K3 N)
6Alopecurus myosuroidesBlackgrass8912
29 SwedenSweden 2014 Spring wheat, Winter barley, and Winter wheat cycloxydim, fenoxaprop-ethyl, flupyrsulfuron-methyl-Na, iodosulfuron-methyl-Na, mesosulfuron-methyl, and pyroxsulam 40 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass10995
30 SwitzerlandSwitzerland 1997 Wheat, and Winter barley chlorotoluron, and isoproturon 41 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass1132
31 SwitzerlandSwitzerland 2019 Wheat, and Winter barley chlorotoluron, iodosulfuron-methyl-Na, mesosulfuron-methyl, and quizalofop-ethyl 41 Multiple Resistance: 3 Sites of Action
Inhibition 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)
6Alopecurus myosuroidesBlackgrass20228
32 TurkeyTurkey 2001 Wheat clodinafop-propargyl 71 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass5116
33 TurkeyTurkey 2008 clodinafop-propargyl, and pyroxsulam 71 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass5403
34 United KingdomUnited Kingdom 1982 Canola, Cereals, and Wheat clethodim, clodinafop-propargyl, cycloxydim, diclofop-methyl, fenoxaprop-ethyl, fluazifop-butyl, pinoxaden, quizalofop-ethyl, and sethoxydim 44 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
6Alopecurus myosuroidesBlackgrass357
35 United KingdomUnited Kingdom 1982 Cereals chlorotoluron, and isoproturon 44 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
6Alopecurus myosuroidesBlackgrass507
36 United KingdomUnited Kingdom 1984 Wheat chlorsulfuron, flupyrsulfuron-methyl-Na, imazamethabenz-methyl, iodosulfuron-methyl-Na, mesosulfuron-methyl, propoxycarbazone-Na, and pyroxsulam 44 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
6Alopecurus myosuroidesBlackgrass323
37 United KingdomUnited Kingdom 1987 Wheat pendimethalin 44 Inhibition of Microtubule Assembly ( HRAC Group 3 (Legacy K1)
6Alopecurus myosuroidesBlackgrass329
Literature about Similar Cases

Page size:
select
Page: of 48
Items 1 to 5 of 237

Page size:
select
Page: of 48
Items 1 to 5 of 237

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.  Monday, October 7, 2024 .  Available  www.weedscience.org Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.