International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 1 (LEGACY A) RESISTANT STERILE OAT
(Avena sterilis ssp. ludoviciana)


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

Australia, Queensland
INTRODUCTION STERILE OAT
Sterile oat (Avena sterilis ssp. ludoviciana) is a monocot weed in the Poaceae family.  In Queensland this weed first evolved resistance to Group 1 (Legacy A) herbicides in 2006 and infests Chickpea, Spring Barley, and Wheat.   Group 1 (Legacy A) herbicides are known as Inhibition of Acetyl CoA Carboxylase (Inhibition of Acetyl CoA Carboxylase ).  Research has shown that these particular biotypes are resistant to clodinafop-propargyl, and diclofop-methyl and they may be cross-resistant to other Group 1 (Legacy A) 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 Feb 03, 2015 )

Common NameSterile oat
SpeciesAvena sterilis ssp. ludoviciana
GroupInhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
Herbicidesclodinafop-propargyl, and diclofop-methyl
LocationAustralia, Queensland
Year2006
Situation(s)Chickpea, Spring Barley, and Wheat
Contributors - (Alphabetically)Steve Walker 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Sterile oat biotype with this Sterile oat 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 resistant Sterile oat 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 Group 1 (Legacy A) resistant Sterile oat from Queensland please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

STEVE WALKER
Principal Agronomist
Farming Systems Institute, Qdpi
Leslie Research Centre
303 North Roberts
PO Box 200201,
Toowoomba, 4350, Queensland
Australia
Email Steve Walker

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Queensland have been instrumental in providing you this information. Particular thanks is given to Steve Walker for providing detailed information.
Herbicide Resistant Sterile oat Globally
(Avena sterilis ssp. ludoviciana)
Herbicide Resistant Sterile oat Globally
(Avena sterilis ssp. ludoviciana)
Drag a column header and drop it here to group by that column
Herbicide Resistant Sterile oat Globally
(Avena sterilis ssp. ludoviciana)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 2002 Wheat flamprop-methyl 1 Antimicrotubule mitotic disrupter ( HRAC Group 0 (Legacy Z)
30Avena sterilis ssp. ludovicianaSterile oat5198
2 Australia (South Australia) AustraliaSouth Australia2005 Wheat iodosulfuron-methyl-Na 1 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
30Avena sterilis ssp. ludovicianaSterile oat5252
3 Australia (Queensland) AustraliaQueensland2006 Chickpea, Spring Barley, and Wheat clodinafop-propargyl, and diclofop-methyl 1 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
30Avena sterilis ssp. ludovicianaSterile oat10967
4 Australia (New South Wales ) AustraliaNew South Wales 2018 Chickpea glyphosate 1 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase ( HRAC Group 9 (Legacy G)
30Avena sterilis ssp. ludovicianaSterile oat18186
5 FranceFrance 1996 Wheat fenoxaprop-ethyl 17 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
30Avena sterilis ssp. ludovicianaSterile oat547
6 IranIran 2006 Canola, and Winter wheat clodinafop-propargyl, diclofop-methyl, fenoxaprop-ethyl, haloxyfop-methyl, pinoxaden, sethoxydim, and tralkoxydim 79 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
30Avena sterilis ssp. ludovicianaSterile oat5339
7 IranIran 2009 Wheat iodosulfuron-methyl-Na, and mesosulfuron-methyl 79 Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
30Avena sterilis ssp. ludovicianaSterile oat10985
8 IranIran 2010 Winter wheat clodinafop-propargyl, iodosulfuron-methyl-Na, and mesosulfuron-methyl 79 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)
30Avena sterilis ssp. ludovicianaSterile oat5541
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