International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP G/9 RESISTANT FEATHER FINGERGRASS
(Chloris virgata)


EPSP synthase inhibitors (G/9)

Australia, New South Wales
INTRODUCTION FEATHER FINGERGRASS
Feather Fingergrass (Chloris virgata) is a monocot weed in the Poaceae family.  In New South Wales this weed first evolved resistance to Group G/9 herbicides in 2015 and infests Fallow.   Group G/9 herbicides are known as EPSP synthase inhibitors (Inhibition of EPSP synthase).  Research has shown that these particular biotypes are resistant to glyphosate and they may be cross-resistant to other Group G/9 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 Feb 08, 2016 )

Common NameFeather Fingergrass
SpeciesChloris virgata
GroupEPSP synthase inhibitors (G/9)
Herbicidesglyphosate
LocationAustralia, New South Wales
Year2015
Situation(s)Fallow
Contributors - (Alphabetically)Christopher Preston 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Feather Fingergrass biotype with this Feather Fingergrass 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 G/9 resistant Feather Fingergrass 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 G/9 resistant Feather Fingergrass from New South Wales please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

CHRISTOPHER PRESTON
University Of Adelaide - Waite Campus
Crc For Australian Weed Management And School Of Agriculture
Box 2146
Adelaide, 5064, South Australia
Australia
Email Christopher Preston

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in New South Wales have been instrumental in providing you this information. Particular thanks is given to Christopher Preston for providing detailed information.
Herbicide Resistant Feather Fingergrass Globally
(Chloris virgata)
Herbicide Resistant Feather Fingergrass Globally
(Chloris virgata)
Drag a column header and drop it here to group by that column
Herbicide Resistant Feather Fingergrass Globally
(Chloris virgata)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 2015 Fallow glyphosate 1 EPSP synthase inhibitors (G/9)
330Chloris virgataFeather Fingergrass11026
2 Australia (Queensland) AustraliaQueensland2015 Fallow glyphosate 1 EPSP synthase inhibitors (G/9)
330Chloris virgataFeather Fingergrass11027
3 Australia (South Australia) AustraliaSouth Australia2015 Roadsides glyphosate 1 EPSP synthase inhibitors (G/9)
330Chloris virgataFeather Fingergrass11028
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, March 29, 2017 .  Available  www.weedscience.org
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