International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT AFRICAN MUSTARD
(Brassica tournefortii)


ALS inhibitors (B/2)

Australia, South Australia
INTRODUCTION AFRICAN MUSTARD
African Mustard (Brassica tournefortii) is a dicot weed in the Brassicaceae family.  In South Australia this weed first evolved resistance to Group B/2 herbicides in 1996 and infests Cereals.   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, imazamox, imazapyr, and sulfometuron-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 Jan 22, 2014 )

Common NameAfrican Mustard
SpeciesBrassica tournefortii
GroupALS inhibitors (B/2)
Herbicideschlorsulfuron, imazamox, imazapyr, and sulfometuron-methyl
LocationAustralia, South Australia
Year1996
Situation(s)Cereals
Contributors - (Alphabetically)Christopher Preston 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible African Mustard biotype with this African 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 African 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

Studies on the mechanism of resistance of Group B/2 resistant African Mustard from South Australia indicate that resistance is due to an altered target site.  There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature
 
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 African Mustard from South Australia 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 South Australia have been instrumental in providing you this information. Particular thanks is given to Christopher Preston for providing detailed information.
Herbicide Resistant African Mustard Globally
(Brassica tournefortii)
Herbicide Resistant African Mustard Globally
(Brassica tournefortii)
Drag a column header and drop it here to group by that column
Herbicide Resistant African Mustard Globally
(Brassica tournefortii)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (Western Australia) AustraliaWestern Australia1992 Wheat chlorsulfuron 1 ALS inhibitors (B/2)
37Brassica tournefortiiAfrican Mustard12
2 Australia (South Australia) AustraliaSouth Australia1996 Cereals chlorsulfuron, imazamox, imazapyr, and sulfometuron-methyl 1 ALS inhibitors (B/2)
37Brassica tournefortiiAfrican Mustard5202
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, October 15, 2019 .  Available  www.weedscience.org
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