International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT ORIENTAL MUSTARD
(Sisymbrium orientale)


ALS inhibitors (B/2)

Australia, Victoria
INTRODUCTION ORIENTAL MUSTARD
Oriental Mustard (Sisymbrium orientale) is a dicot weed in the Brassicaceae family.  In Victoria this weed first evolved resistance to Group B/2 herbicides in 2010 and infests Spring Barley, and 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 chlorsulfuron, and metosulam 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 Jan 22, 2014 )

Common NameOriental Mustard
SpeciesSisymbrium orientale
GroupALS inhibitors (B/2)
Herbicideschlorsulfuron, and metosulam
LocationAustralia, Victoria
Year2010
Situation(s)Spring Barley, and Wheat
Contributors - (Alphabetically)Peter Boutsalis, and Christopher Preston 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Oriental Mustard biotype with this Oriental Mustard 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 Oriental Mustard 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 Oriental Mustard from Victoria 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

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Victoria have been instrumental in providing you this information. Particular thanks is given to Peter Boutsalis, and Christopher Preston for providing detailed information.
Herbicide Resistant Oriental Mustard Globally
(Sisymbrium orientale)
Herbicide Resistant Oriental Mustard Globally
(Sisymbrium orientale)
Drag a column header and drop it here to group by that column
Herbicide Resistant Oriental Mustard Globally
(Sisymbrium orientale)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (South Australia) AustraliaSouth Australia1990 Spring Barley, and Wheat chlorsulfuron, imazethapyr, metosulam, metsulfuron-methyl, and triasulfuron 1 ALS inhibitors (B/2)
159Sisymbrium orientaleOriental Mustard24
2 Australia (Queensland) AustraliaQueensland1993 Wheat chlorsulfuron 1 ALS inhibitors (B/2)
159Sisymbrium orientaleOriental Mustard11
3 Australia (Western Australia) AustraliaWestern Australia1994 Cereals, Spring Barley, and Wheat chlorsulfuron, and metosulam 1 ALS inhibitors (B/2)
159Sisymbrium orientaleOriental Mustard3
4 Australia (New South Wales ) AustraliaNew South Wales 1994 Cereals, Spring Barley, and Wheat chlorsulfuron, and metosulam 1 ALS inhibitors (B/2)
159Sisymbrium orientaleOriental Mustard5035
5 Australia (South Australia) AustraliaSouth Australia2005 Cereals 2,4-D, imazethapyr, MCPA, metosulam, and metsulfuron-methyl 1 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
159Sisymbrium orientaleOriental Mustard5270
6 Australia (Victoria) AustraliaVictoria2010 Spring Barley, and Wheat chlorsulfuron, and metosulam 1 ALS inhibitors (B/2)
159Sisymbrium orientaleOriental Mustard7842
7 Australia (Victoria) AustraliaVictoria2011 Peas diflufenican 1 Carotenoid biosynthesis inhibitors (F1/12)
159Sisymbrium orientaleOriental Mustard5603
8 Australia (Victoria) AustraliaVictoria2011 Canola atrazine 1 Photosystem II inhibitors (C1/5)
159Sisymbrium orientaleOriental Mustard5712
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, August 16, 2017 .  Available  www.weedscience.org
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