INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Fountain grass (Cenchrus setaceus) is a monocot weed in the Poaceae family. In Spain this weed first evolved resistance to Group 9 (Legacy G) herbicides in 2026 and infests Roadsides. 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.
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| Common Name | Fountain grass | | Species | Cenchrus setaceus | | Group | Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
HRAC Group 9 (Legacy G)
| | Herbicides | glyphosate | | Location | Spain, Andalusia / southern Spain | | Year | 2026 | | Situation(s) | Roadsides | | Contributors - (Alphabetically) | Ricardo Alcántara-de la Cruz, Hugo Cruz-Hipólito, Rafael De Prado, Ja Dominguez Valenzuela, Javid Gherekhloo, Candelario Palma-Bautista, Antonia-Maria Rojano-Delgado, and Joel Torra | |
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| | Greenhouse, and Laboratory trials comparing a known susceptible Fountain grass biotype with this Fountain 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. |
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| | Genetic studies on HRAC Group 9 resistant Fountain 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 |
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| | Studies on the mechanism of resistance of Group 9 (Legacy G) resistant Fountain grass from Spain indicate that resistance is due to an altered target site. There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature |
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| | 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 Fountain grass from Spain please update the database. |
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| Research Asociate
Universidad De Córdoba
Química Agrícola Y Edafología
Campus Universitario De Rabanales Edif. C-3 3ª Planta
Córdoba, 14002, Andalucia
Spain
Email Hugo Cruz-Hipólito |
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| Research Asociate
Universidad De Cordoba
Qvimica Agricola Y Edafologa
E T S Ingenieros Agronomos
PO Box 119
Cordoba, E-14080, Andalusia
Spain
Email Rafael De Prado |
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| Phd
Universidad Autónoma Chapingo
Parasitología Agrícola
Area De Malezas Departamento De Parasitología Agricola
Texcoco, 56230, Andalusia
Mexico
Email Ja Dominguez Valenzuela |
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| Associate Professor
Gorgan University of Agricultural Sciences and Natural Resources
Agronomy Department
Area De Malezas Departamento De Parasitología Agricola
Gorgan, 49189-43464, Golestan
Iran
Email Javid Gherekhloo |
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| Investigador Posdoctoral
Universidad Autónoma Chapingo
Departamento de Parasitología Agrícola
Campus Central
Carretera México – Texcoco Km 38.5 Texcoco, México CP 56230
Texcoco, 56230, Estado de México
Mexico
Email Candelario Palma-Bautista |
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| Researcher
University of Cordoba
Departamento de Parasitología Agrícola
Campus of Rabanales
Ctra. Nacional IV - Km 396. C-3, Edif. Marie Curie, 3º floor.
Cordoba, 14071, Cordoba
Spain
Email Antonia-Maria Rojano-Delgado |
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| Research Assistant
University Of Lleida
Depart. Hortofructicultura
Botànica I Jardineria
Rovira Roure
191, Etsea, Ed. 1
Lleida, 25198, Cordoba
Spain
Email Joel Torra |
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| Drag a column header and drop it here to group by that column |
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1
| Spain | Spain | | 2026 |
Roadsides
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glyphosate
| 38 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 4359 | Cenchrus setaceus | Fountain grass | 39290 |
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Heap, I. The International Herbicide-Resistant Weed Database. Online.
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Available at
www.weedscience.org
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