International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT STERILE OAT
(Avena sterilis ssp. ludoviciana)


ALS inhibitors (B/2)

Iran, Khuzestan
INTRODUCTION STERILE OAT
Sterile oat (Avena sterilis ssp. ludoviciana) is a monocot weed in the Poaceae family.  In Iran this weed first evolved resistance to Group B/2 herbicides in 2009 and infests 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 iodosulfuron-methyl-sodium, and mesosulfuron-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 Apr 07, 2015 )

Common NameSterile oat
SpeciesAvena sterilis ssp. ludoviciana
GroupALS inhibitors (B/2)
Herbicidesiodosulfuron-methyl-sodium, and mesosulfuron-methyl
LocationIran, Khuzestan
Year2009
Situation(s)Wheat
Contributors - (Alphabetically)Eskandar Zand 
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ACADEMIC ASPECTS

Confirmation Tests

Field, and 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 Group B/2 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 B/2 resistant Sterile oat from Iran please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

ESKANDAR ZAND
Weed Researcher
Plant Peast & Deisease Research Institute
Weed Research Department
Plant Pest And Disease Research In
105 Kirkwood Dr
Tehran, 19395
Iran
Email Eskandar Zand

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Iran have been instrumental in providing you this information. Particular thanks is given to Eskandar Zand 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 (Z/25)
30Avena sterilis ssp. ludovicianaSterile oat5198
2 Australia (South Australia) AustraliaSouth Australia2005 Wheat iodosulfuron-methyl-sodium 1 ALS inhibitors (B/2)
30Avena sterilis ssp. ludovicianaSterile oat5252
3 Australia (Queensland) AustraliaQueensland2006 Chickpea, Spring Barley, and Wheat clodinafop-propargyl, and diclofop-methyl 1 ACCase inhibitors (A/1)
30Avena sterilis ssp. ludovicianaSterile oat10967
4 FranceFrance 1996 Wheat fenoxaprop-P-ethyl 17 ACCase inhibitors (A/1)
30Avena sterilis ssp. ludovicianaSterile oat547
5 IranIran 2006 Canola, and Winter wheat clodinafop-propargyl, diclofop-methyl, fenoxaprop-P-ethyl, haloxyfop-methyl, pinoxaden, sethoxydim, and tralkoxydim 79 ACCase inhibitors (A/1)
30Avena sterilis ssp. ludovicianaSterile oat5339
6 IranIran 2009 Wheat iodosulfuron-methyl-sodium, and mesosulfuron-methyl 79 ALS inhibitors (B/2)
30Avena sterilis ssp. ludovicianaSterile oat10985
7 IranIran 2010 Winter wheat clodinafop-propargyl, iodosulfuron-methyl-sodium, and mesosulfuron-methyl 79 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
30Avena sterilis ssp. ludovicianaSterile oat5541
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, March 27, 2017 .  Available  www.weedscience.org
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