International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP G/9 RESISTANT LIVERSEEDGRASS
(Urochloa panicoides)


EPSP synthase inhibitors (G/9)

Australia, New South Wales
INTRODUCTION LIVERSEEDGRASS
Liverseedgrass (Urochloa panicoides) is a monocot weed in the Poaceae family.  In New South Wales this weed first evolved resistance to Group G/9 herbicides in 2008 and infests Sorghum, and Wheat.   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 03, 2015 )

Common NameLiverseedgrass
SpeciesUrochloa panicoides
GroupEPSP synthase inhibitors (G/9)
Herbicidesglyphosate
LocationAustralia, New South Wales
Year2008
Situation(s)Sorghum, and Wheat
Contributors - (Alphabetically)Peter Boutsalis, Christopher Preston, and Andrew Storrie 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Liverseedgrass biotype with this Liverseedgrass 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 Liverseedgrass 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 Liverseedgrass from New South Wales please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

PETER BOUTSALIS
Postdoctural Fellow/ Consultant
University Of Adelaide / Plant Science Consulting
Plant And Pest Science
800 N Lindbergh Blvd
02G
Adelaide, 5064, South Australia
Australia
Email Peter Boutsalis
CHRISTOPHER PRESTON
Postdoctural Fellow/ Consultant
University Of Adelaide - Waite Campus
Crc For Australian Weed Management And School Of Agriculture
Box 2146
Adelaide, 5064, South Australia
Australia
Email Christopher Preston
ANDREW STORRIE
Principal
Agronomo
Crc For Australian Weed Management And School Of Agriculture
Po Box 5444
Albany, 6332, Western Australia
Australia
Email Andrew Storrie
Web   : Web Site Link

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 Peter Boutsalis, Christopher Preston, and Andrew Storrie for providing detailed information.
Herbicide Resistant Liverseedgrass Globally
(Urochloa panicoides)
Herbicide Resistant Liverseedgrass Globally
(Urochloa panicoides)
Drag a column header and drop it here to group by that column
Herbicide Resistant Liverseedgrass Globally
(Urochloa panicoides)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (Queensland) AustraliaQueensland1996 Cropland atrazine 1 Photosystem II inhibitors (C1/5)
171Urochloa panicoidesLiverseedgrass530
2 Australia (New South Wales ) AustraliaNew South Wales 2008 Sorghum, and Wheat glyphosate 1 EPSP synthase inhibitors (G/9)
171Urochloa panicoidesLiverseedgrass5362
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