HRAC GROUP 9 (LEGACY G) RESISTANT COMPACT BROME
(Bromus madritensis)

Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)

Spain

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INTRODUCTION COMPACT BROME Compact Brome (Bromus madritensis) is a monocot weed in the Poaceae family.  In Spain this weed first evolved resistance to Group 9 (Legacy G) herbicides in 2018 and infests Grapes, and Olive.   Group 9 (Legacy G) herbicides are known as Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (Inhibition of EPSP synthase).  Research has shown that these particular biotypes are resistant to glyphosate and they may be cross-resistant to other Group 9 (Legacy G) 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 Nov 26, 2020 ) Common Name Compact Brome Species Bromus madritensis Group Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G) Herbicides glyphosate Location Spain Year 2018 Situation(s) Grapes, and Olive Contributors - (Alphabetically) Rafael De Prado, and Joel Torra  Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS Confirmation Tests Greenhouse trials comparing a known susceptible Compact Brome biotype with this Compact Brome 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 9 resistant Compact Brome 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 9 (Legacy G) resistant Compact Brome from Spain please update the database.   Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS RAFAEL DE PRADO Universidad De Cordoba Qvimica Agricola Y Edafologa E T S Ingenieros Agronomos PO Box 119 Cordoba, E-14080, Andalusia Spain Email Rafael De Prado JOEL TORRA Research Assistant University Of Lleida Depart. Hortofructicultura Botànica I Jardineria Rovira Roure 191, Etsea, Ed. 1 Lleida, 25198, Andalusia Spain Email Joel Torra

ACKNOWLEDGEMENTS The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Spain have been instrumental in providing you this information. Particular thanks is given to Rafael De Prado, and Joel Torra for providing detailed information.

Herbicide Resistant Compact Brome Globally (Bromus madritensis) Herbicide Resistant Compact Brome Globally (Bromus madritensis) Drag a column header and drop it here to group by that column Herbicide Resistant Compact Brome Globally (Bromus madritensis) # Country Country StateName FirstYear Situation Active Ingredients CountryID Site of Action WeedID Species CommonName ResistID 1 Spain Spain   2018 Grapes, and Olive glyphosate 38 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase ( HRAC Group 9 (Legacy G) 352 Bromus madritensis Compact Brome 18209

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