International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP A/1 RESISTANT ETHIOPIAN GRASS
(Snowdenia polystachya)


ACCase inhibitors (A/1)

Ethiopia, Oromiya
INTRODUCTION ETHIOPIAN GRASS
Ethiopian grass (Snowdenia polystachya) is a monocot weed in the Poaceae family.  In Ethiopia this weed first evolved resistance to Group A/1 herbicides in 1998 and infests Wheat.   Group A/1 herbicides are known as ACCase inhibitors (Inhibition of acetyl CoA carboxylase (ACCase)).  Research has shown that these particular biotypes are resistant to fenoxaprop-P-ethyl and they may be cross-resistant to other Group A/1 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 Jun 06, 2000 )

Common NameEthiopian grass
SpeciesSnowdenia polystachya
GroupACCase inhibitors (A/1)
Herbicidesfenoxaprop-P-ethyl
LocationEthiopia, Oromiya
Year1998
Situation(s)Wheat
Contributors - (Alphabetically)Peter Boutsalis 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Peter Boutsalis
Ethiopia in state owned cereal farms in Oromiya area.

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CONTROL STRATEGIES

Peter Boutsalis
Whilst this weed is local it is problematic due to cross-resistance to ACCase inhibiting grass killers

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OTHER CONTACTS

Peter Boutsalis
Giuseppe Franceschi- franceschi.giuseppe@cp.novartis.com

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ACADEMIC ASPECTS

Confirmation Tests

Field, and Greenhouse trials comparing a known susceptible Ethiopian grass biotype with this Ethiopian grass 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 A/1 resistant Ethiopian grass 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 A/1 resistant Ethiopian grass from Ethiopia please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

PETER BOUTSALIS
Postdoctural Fellow/ Consultant
University Of Adelaide / Plant Science Consulting
Plant And Pest Science
800 N Lindbergh Blvd
02G
Adelaide, 5064, South Australia
Australia
Email Peter Boutsalis

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Ethiopia have been instrumental in providing you this information. Particular thanks is given to Peter Boutsalis for providing detailed information.
Herbicide Resistant Ethiopian grass Globally
(Snowdenia polystachya)
Herbicide Resistant Ethiopian grass Globally
(Snowdenia polystachya)
Drag a column header and drop it here to group by that column
Herbicide Resistant Ethiopian grass Globally
(Snowdenia polystachya)
#CountryFirstYearSituationActive IngredientsSite of Action
1 EthiopiaEthiopia 1998 Wheat fenoxaprop-P-ethyl 76 ACCase inhibitors (A/1)
195Snowdenia polystachyaEthiopian grass5027
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Friday, April 28, 2017 .  Available  www.weedscience.org
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