International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
MULTIPLE RESISTANT HEDGEHOG DOGTAILGRASS
(Cynosurus echinatus)


Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)

Chile
INTRODUCTION HEDGEHOG DOGTAILGRASS
Hedgehog Dogtailgrass (Cynosurus echinatus) is a monocot weed in the Poaceae family.  In Chile this weed first evolved multiple resistance (to 2 herbicide sites of action) in 2004 and infests Wheat.  Multiple resistance has evolved to herbicides in the Groups A/1, and B/2.  These particular biotypes are known to have resistance to diclofop-methyl, flucarbazone-sodium, halosulfuron-methyl, haloxyfop-methyl, and tepraloxydim and they may be cross-resistant to other herbicides in the Groups A/1, and B/2.

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 Feb 09, 2013 )

Common NameHedgehog Dogtailgrass
SpeciesCynosurus echinatus
GroupACCase inhibitors (A/1)
ALS inhibitors (B/2)
Herbicidesdiclofop-methyl, flucarbazone-sodium, halosulfuron-methyl, haloxyfop-methyl, and tepraloxydim
LocationChile
Year2004
Situation(s)Wheat
Contributors - (Alphabetically)Nelson Espinoza 
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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Hedgehog Dogtailgrass biotype with this Hedgehog Dogtailgrass 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 A, B/1, 2 resistant Hedgehog Dogtailgrass 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 multiple resistant Hedgehog Dogtailgrass 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

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 for providing detailed information.
Herbicide Resistant Hedgehog Dogtailgrass Globally
(Cynosurus echinatus)
Herbicide Resistant Hedgehog Dogtailgrass Globally
(Cynosurus echinatus)
Drag a column header and drop it here to group by that column
Herbicide Resistant Hedgehog Dogtailgrass Globally
(Cynosurus echinatus)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ChileChile 1999 Canola, and Wheat clodinafop-propargyl 8 ACCase inhibitors (A/1)
205Cynosurus echinatusHedgehog Dogtailgrass5104
2 ChileChile 2004 Wheat diclofop-methyl, flucarbazone-sodium, halosulfuron-methyl, haloxyfop-methyl, and tepraloxydim 8 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
205Cynosurus echinatusHedgehog Dogtailgrass5421
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, November 21, 2017 .  Available  www.weedscience.org
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