International Survey of Herbicide-Resistant Weeds

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GROUP B/2 RESISTANT WILD RADISH
(Raphanus raphanistrum)


ALS inhibitors (B/2)

Australia, Western Australia
INTRODUCTION WILD RADISH
Wild Radish (Raphanus raphanistrum) is a dicot weed in the Brassicaceae family.  In Western Australia this weed first evolved resistance to Group B/2 herbicides in 1997 and infests Cereals, 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 Nov 20, 2000 )

Common NameWild Radish
SpeciesRaphanus raphanistrum
GroupALS inhibitors (B/2)
Herbicideschlorsulfuron, and metosulam
LocationAustralia, Western Australia
Year1997
Situation(s)Cereals, and Wheat
Contributors - (Alphabetically)David Bowran, Abul Hashem, and Stephen Powles 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Abul Hashem
Now have 68 populations with ALS inhibitor resistance. Some paddocks found in Western Australia and some in South Australia.

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GENERAL

Abul Hashem
Resistant to sulfonylureas.

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SPREAD

Stephen Powles
In 1999, a random survey was conducted employing this test to establish the current extent of chlorsulfuron resistance in wild radish populations. The survey covered more than 200 fields in the northern, central, and eastern wheatbelt regions of Western Australia. Wild radish plants were collected from wheat crops in 133 of these fields. The Quick-Test method was used to screen these plants with the acetolactate synthase (ALS)-inhibiting herbicide chlorsulfuron. Overall, 21% of randomly collected wild radish populations were found to be resistant to chlorsulfuron. Weed Technology 2001 vol.15 no. 2 High Frequency of Chlorsulfuron-Resistant Wild Radish (Raphanus raphanistrum) Populations across the Western Australian Wheatbelt. MICHAEL J. WALSH, RYAN D. DUANE, STEPHEN B. POWLES, pages 199–203.

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ACADEMIC ASPECTS

Confirmation Tests

Laboratory trials comparing a known susceptible Wild Radish biotype with this Wild Radish 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 Wild Radish 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 Wild Radish from Western Australia please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

DAVID BOWRAN
Research Officer
Agriculture Wa
748 Railroad Hwy
Northam, Western Australia
Australia
Email David Bowran
ABUL HASHEM
Senior Research Officer (weed Science)
Agriculture Western Australia
Department Of Agriculture And Food Wa
Hampton Roads Ag Res And Ext Center
1444 Diamond Springs Rd,
Northam, 6401, Western Australia
Australia
Email Abul Hashem
STEPHEN POWLES
Professor And Research Director
University Of Western Australia
School Of Plant Biology
2276 Dahlk Circle
Crawley, 6009, Western Australia
Australia
Email Stephen Powles
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Western Australia have been instrumental in providing you this information. Particular thanks is given to David Bowran, Abul Hashem, and Stephen Powles for providing detailed information.
Herbicide Resistant Wild Radish Globally
(Raphanus raphanistrum)
Herbicide Resistant Wild Radish Globally
(Raphanus raphanistrum)
Drag a column header and drop it here to group by that column
Herbicide Resistant Wild Radish Globally
(Raphanus raphanistrum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (Western Australia) AustraliaWestern Australia1997 Cereals, and Wheat chlorsulfuron, and metosulam 1 ALS inhibitors (B/2)
141Raphanus raphanistrumWild Radish522
2 Australia (Western Australia) AustraliaWestern Australia1998 Cropland chlorsulfuron, diflufenican, and metosulam 1 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Carotenoid biosynthesis inhibitors (F1/12)
141Raphanus raphanistrumWild Radish5033
3 Australia (South Australia) AustraliaSouth Australia1998 Spring Barley, and Wheat chlorsulfuron, iodosulfuron-methyl-sodium, and metosulam 1 ALS inhibitors (B/2)
141Raphanus raphanistrumWild Radish5034
4 Australia (Western Australia) AustraliaWestern Australia1999 Lupins, and Triazine-tolerant canola atrazine, and simazine 1 Photosystem II inhibitors (C1/5)
141Raphanus raphanistrumWild Radish1135
5 Australia (Western Australia) AustraliaWestern Australia1999 Cereals 2,4-D 1 Synthetic Auxins (O/4)
141Raphanus raphanistrumWild Radish5358
6 Australia (New South Wales ) AustraliaNew South Wales 2004 Cereals chlorsulfuron, metsulfuron-methyl, and triasulfuron 1 ALS inhibitors (B/2)
141Raphanus raphanistrumWild Radish5338
7 Australia (South Australia) AustraliaSouth Australia2006 Cereals 2,4-D, diflufenican, MCPA, and triasulfuron 1 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
Carotenoid biosynthesis inhibitors (F1/12)
Synthetic Auxins (O/4)
141Raphanus raphanistrumWild Radish5364
8 Australia (Victoria) AustraliaVictoria2009 Spring Barley, and Wheat 2,4-D, chlorsulfuron, and metosulam 1 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Synthetic Auxins (O/4)
141Raphanus raphanistrumWild Radish7845
9 Australia (Western Australia) AustraliaWestern Australia2010 Fallow 2,4-D, chlorsulfuron, diflufenican, glyphosate, imazethapyr, MCPA, metosulam, and sulfometuron-methyl 1 Multiple Resistance: 4 Sites of Action
ALS inhibitors (B/2)
Carotenoid biosynthesis inhibitors (F1/12)
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
141Raphanus raphanistrumWild Radish7888
10 Australia (Victoria) AustraliaVictoria2011 Spring Barley, and Wheat 2,4-D 1 Synthetic Auxins (O/4)
141Raphanus raphanistrumWild Radish7846
11 Australia (New South Wales ) AustraliaNew South Wales 2013 Oats, Spring Barley, and Wheat 2,4-D 1 Synthetic Auxins (O/4)
141Raphanus raphanistrumWild Radish7839
12 BrazilBrazil 2013 Spring Barley, and Wheat chlorimuron-ethyl, cloransulam-methyl, imazapic, imazapyr, iodosulfuron-methyl-sodium, metsulfuron-methyl, and sulfometuron-methyl 5 ALS inhibitors (B/2)
141Raphanus raphanistrumWild Radish7895
13 South AfricaSouth Africa 1997 Spring Barley, and Wheat chlorsulfuron, iodosulfuron-methyl-sodium, metsulfuron-methyl, thifensulfuron-methyl, triasulfuron, and tribenuron-methyl 37 ALS inhibitors (B/2)
141Raphanus raphanistrumWild Radish5197
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