HRAC GROUP 1 (LEGACY A) RESISTANT ETHIOPIAN GRASS
(Snowdenia polystachya)

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

Ethiopia, Oromiya

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INTRODUCTION ETHIOPIAN GRASS Ethiopian grass (Snowdenia polystachya) is a monocot weed in the Poaceae family.  In Ethiopia this weed first evolved resistance to Group 1 (Legacy A) herbicides in 1998 and infests 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 fenoxaprop-ethyl 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.

QUIK STATS (last updated Jun 06, 2000 ) Common Name Ethiopian grass Species Snowdenia polystachya Group Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A) Herbicides fenoxaprop-ethyl Location Ethiopia, Oromiya Year 1998 Situation(s) Wheat Contributors - (Alphabetically) Peter Boutsalis  Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE AREAS FOUND Peter Boutsalis Ethiopia in state owned cereal farms in Oromiya area. Edit this Note  |  Add New Note   CONTROL STRATEGIES Peter Boutsalis Whilst this weed is local it is problematic due to cross-resistance to ACCase inhibiting grass killers Edit this Note  |  Add New Note   OTHER CONTACTS Peter Boutsalis Giuseppe Franceschi- franceschi.giuseppe@cp.novartis.com Edit this Note  |  Add New Note

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 HRAC Group 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 1 (Legacy A) resistant Ethiopian grass from Ethiopia please update the database.   Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

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) # Country Country StateName FirstYear Situation Active Ingredients CountryID Site of Action WeedID Species CommonName ResistID 1 Ethiopia Ethiopia   1998 Wheat fenoxaprop-ethyl 76 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A) 195 Snowdenia polystachya Ethiopian grass 5027

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