International Survey of Herbicide-Resistant Weeds

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


ALS inhibitors (B/2)

Chile, La Araucanía
INTRODUCTION RADISH
Radish (Raphanus sativus) is a dicot weed in the Brassicaceae family.  In Chile this weed first evolved resistance to Group B/2 herbicides in 2010 and infests 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 flucarbazone-sodium, imazamox, imazapyr, iodosulfuron-methyl-sodium, metsulfuron-methyl, pyroxsulam, and triasulfuron 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 Dec 22, 2011 )

Common NameRadish
SpeciesRaphanus sativus
GroupALS inhibitors (B/2)
Herbicidesflucarbazone-sodium, imazamox, imazapyr, iodosulfuron-methyl-sodium, metsulfuron-methyl, pyroxsulam, and triasulfuron
LocationChile, La Araucanía
Year2010
Situation(s)Wheat
Contributors - (Alphabetically)Nelson Espinoza, and Cristian Rodriguez 
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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 Chile please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

NELSON ESPINOZA
Investigador Malherbología
Inia-Carillanca
Producción Vegetal
USDA-ARS, 302 Natural Resources Bldg
Cropping Systems& Water Quality
Temuco
Chile
Email Nelson Espinoza
Web   : Web Site Link
CRISTIAN RODRIGUEZ
Agronomist
Inia-Carillanca
Producción Vegetal
USDA-ARS, 302 Natural Resources Bldg
Cropping Systems& Water Quality
Temuco
Chile
Email Cristian Rodriguez
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Chile have been instrumental in providing you this information. Particular thanks is given to Nelson Espinoza, and Cristian Rodriguez 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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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, September 19, 2019 .  Available  www.weedscience.org
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