International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT RADISH
(Raphanus sativus)


ALS inhibitors (B/2)

Argentina
INTRODUCTION RADISH
Radish (Raphanus sativus) is a dicot weed in the Brassicaceae family.  In Argentina this weed first evolved resistance to Group B/2 herbicides in 2008 and infests Canola, Sunflower, and 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 bispyribac-sodium, chlorimuron-ethyl, diclosulam, flucarbazone-sodium, flumetsulam, imazamox, imazapyr, imazethapyr, iodosulfuron-methyl-sodium, and metsulfuron-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 Aug 07, 2013 )

Common NameRadish
SpeciesRaphanus sativus
GroupALS inhibitors (B/2)
Herbicidesbispyribac-sodium, chlorimuron-ethyl, diclosulam, flucarbazone-sodium, flumetsulam, imazamox, imazapyr, imazethapyr, iodosulfuron-methyl-sodium, and metsulfuron-methyl
LocationArgentina
Year2008
Situation(s)Canola, Sunflower, and Wheat
Contributors - (Alphabetically)Miguel Cantamutto, Claudio Pandolfo, and Alejandro Presotto 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Claudio Pandolfo
Spread in several fields in the southeastern Buenos Aires province. By now, there are at least seven resistant biotypes.

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GENERAL

Claudio Pandolfo
Pandolfo, C. E., Presotto, A., Poverene, M., Cantamutto, M. 2013. Limited occurrence of resistant radish (Raphanus sativus) to AHAS-inhibiting herbicides in Argentina. Planta Daninha 31(3):657-666.

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GENERAL

Claudio Pandolfo
There are no differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes. Resistant biotype could produce more than 3000 seeds per plant.
 

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ACADEMIC ASPECTS

Confirmation Tests

Field, and Greenhouse trials comparing a known susceptible Radish biotype with this Radish 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 Radish 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 Radish from Argentina please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

MIGUEL CANTAMUTTO
Full Profesor
Universidad Nacional Del Sur
Departamento De Agronomía
San Andrés 800
Bahía Blanca, 8000, Buenos Aires
Argentina
Email Miguel Cantamutto
CLAUDIO PANDOLFO
Dr. - Postdoc - T.A.
Universidad Nacional Del Sur, CERZOS-CONICET
Departamento De Agronomía
San Andrés 800
Bahía Blanca, 8000, Buenos Aires
Argentina
Email Claudio Pandolfo
Web   : Web Site Link
ALEJANDRO PRESOTTO
Adjunct Researcher
Universidad Nacional del Sur; CERZOS-CONICET
Departamento de Agronomía
San Andrés 800
Bahía Blanca, 8000, Buenos Aires
Argentina
Email Alejandro Presotto
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Argentina have been instrumental in providing you this information. Particular thanks is given to Miguel Cantamutto, Claudio Pandolfo, and Alejandro Presotto for providing detailed information.
Herbicide Resistant Radish Globally
(Raphanus sativus)
Herbicide Resistant Radish Globally
(Raphanus sativus)
Drag a column header and drop it here to group by that column
Herbicide Resistant Radish Globally
(Raphanus sativus)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ArgentinaArgentina 2008 Canola, Sunflower, and Wheat bispyribac-sodium, chlorimuron-ethyl, diclosulam, flucarbazone-sodium, flumetsulam, imazamox, imazapyr, imazethapyr, iodosulfuron-methyl-sodium, and metsulfuron-methyl 48 ALS inhibitors (B/2)
224Raphanus sativusRadish6738
2 BrazilBrazil 2001 Wheat chlorimuron-ethyl, cloransulam-methyl, imazethapyr, metsulfuron-methyl, and nicosulfuron 5 ALS inhibitors (B/2)
224Raphanus sativusRadish5201
3 ChileChile 2010 Wheat flucarbazone-sodium, imazamox, imazapyr, iodosulfuron-methyl-sodium, metsulfuron-methyl, pyroxsulam, and triasulfuron 8 ALS inhibitors (B/2)
224Raphanus sativusRadish5583
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