International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT STARFRUIT
(Damasonium minus)


ALS inhibitors (B/2)

Australia, New South Wales
INTRODUCTION STARFRUIT
Starfruit (Damasonium minus) is a monocot weed in the Alismataceae family.  In New South Wales this weed first evolved resistance to Group B/2 herbicides in 1994 and infests Rice.   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 bensulfuron-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 Jun 06, 2000 )

Common NameStarfruit
SpeciesDamasonium minus
GroupALS inhibitors (B/2)
Herbicidesbensulfuron-methyl
LocationAustralia, New South Wales
Year1994
Situation(s)Rice
Contributors - (Alphabetically)Jim Pratley, and Andrew Storrie 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Andrew Storrie
Irrigation areas of southern NSW.

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GENERAL

Andrew Storrie
No replacement chemicals for bensulfuron.

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ACADEMIC ASPECTS

Confirmation Tests

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

JIM PRATLEY
Dean, Faculty Of Science & Agriculture
Charles Sturt University
School Of Agriculture
Dept of Crop& Soil Sciences
PO Box 646420,
Wagga Wagga, 2678, New South Wales
Australia
Email Jim Pratley
ANDREW STORRIE
Principal
Agronomo
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 Jim Pratley, and Andrew Storrie for providing detailed information.
Herbicide Resistant Starfruit Globally
(Damasonium minus)
Herbicide Resistant Starfruit Globally
(Damasonium minus)
Drag a column header and drop it here to group by that column
Herbicide Resistant Starfruit Globally
(Damasonium minus)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 1994 Rice bensulfuron-methyl 1 ALS inhibitors (B/2)
74Damasonium minusStarfruit8
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, December 16, 2019 .  Available  www.weedscience.org
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