International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 9 (LEGACY G) RESISTANT SUMATRAN FLEABANE
(Conyza sumatrensis)


Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)

Turkey, Canakkale Province
INTRODUCTION SUMATRAN FLEABANE
Sumatran Fleabane (Conyza sumatrensis) is a dicot weed in the Asteraceae family.  In Turkey this weed first evolved resistance to Group 9 (Legacy G) herbicides in 2019 and infests Peaches.   Group 9 (Legacy G) herbicides are known as Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (Inhibition of EPSP synthase).  Research has shown that these particular biotypes are resistant to glyphosate and they may be cross-resistant to other Group 9 (Legacy G) 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 Aug 19, 2019 )

Common NameSumatran Fleabane
SpeciesConyza sumatrensis
GroupInhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
Herbicidesglyphosate
LocationTurkey, Canakkale Province
Year2019
Situation(s)Peaches
Contributors - (Alphabetically)Kassim Al-Khatib, Liberty Galvin, Deniz Inci, and Ahmet Uludag 
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ACADEMIC ASPECTS

Confirmation Tests

Field, and Greenhouse trials comparing a known susceptible Sumatran Fleabane biotype with this Sumatran Fleabane 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 HRAC Group 9 resistant Sumatran Fleabane 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 9 (Legacy G) resistant Sumatran Fleabane from Turkey please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

KASSIM AL-KHATIB
Director and Ce Specialist, Statewide IPM Program
Statewide IPM Program
Integrated Pest Management
2801 Second Street #152
Davis, 95618-7774, California
United States
Email Kassim Al-Khatib
Web   : Web Site Link
LIBERTY GALVIN
Graduate Student
UC Davis
Plant Sciences
One Shields Ave
MS4
Davis, 95616, California
United States
Email Liberty Galvin
Web   : Web Site Link
DENIZ INCI
Ph.D. Student
University of California, Davis
Department of Plant Sciences
One Shields Avenue
Davis, 95616, California
United States
Email Deniz Inci
Web   : Web Site Link
AHMET ULUDAG
Professor
Canakkale Onsekiz Mart University
Plant Protection
COMU, Ziraat Fakultesi
Bitki Koruma Bolumu, Terzioglu Yerleskesi
Canakkale, 17020, Canakkale
Turkey
Email Ahmet Uludag
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Turkey have been instrumental in providing you this information. Particular thanks is given to Kassim Al-Khatib, Liberty Galvin, Deniz Inci, and Ahmet Uludag for providing detailed information.
Herbicide Resistant Sumatran Fleabane Globally
(Conyza sumatrensis)
Herbicide Resistant Sumatran Fleabane Globally
(Conyza sumatrensis)
Drag a column header and drop it here to group by that column
Herbicide Resistant Sumatran Fleabane Globally
(Conyza sumatrensis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (Queensland) AustraliaQueensland2018 Fallow, and Wheat paraquat 1 PS I Electron Diversion (D/22)
65Conyza sumatrensisSumatran Fleabane17148
2 Australia (Queensland) AustraliaQueensland2018 Fallow glyphosate 1 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane18161
3 BrazilBrazil 2010 Corn (maize), and Soybean glyphosate 5 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane5577
4 BrazilBrazil 2011 Soybean chlorimuron-ethyl 5 Inhibition of Acetolactate Synthase (B/2)
65Conyza sumatrensisSumatran Fleabane5647
5 BrazilBrazil 2011 Corn (maize), and Soybean chlorimuron-ethyl, and glyphosate 5 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane5648
6 BrazilBrazil 2016 Soybean paraquat 5 PS I Electron Diversion (D/22)
65Conyza sumatrensisSumatran Fleabane16082
7 BrazilBrazil 2017 Soybean saflufenacil 5 Inhibition of Protoporphyrinogen Oxidase (E/14)
65Conyza sumatrensisSumatran Fleabane17099
8 BrazilBrazil 2017 Soybean chlorimuron-ethyl, glyphosate, and paraquat 5 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PS I Electron Diversion (D/22)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane17102
9 BrazilBrazil 2017 Soybean 2,4-D, diuron, glyphosate, paraquat, and saflufenacil 5 Multiple Resistance: 5 Sites of Action
PSII inhibitors - Serine 264 Binders (C1 C2/7)
PS I Electron Diversion (D/22)
Inhibition of Protoporphyrinogen Oxidase (E/14)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Auxin Mimics (O/4)
65Conyza sumatrensisSumatran Fleabane17135
10 FranceFrance 2010 Grapes glyphosate 17 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane9932
11 FranceFrance 2016 Grapes flazasulfuron, iodosulfuron-methyl-Na, mesosulfuron-methyl, and penoxsulam 17 Inhibition of Acetolactate Synthase (B/2)
65Conyza sumatrensisSumatran Fleabane17114
12 FranceFrance 2016 Grapes flazasulfuron, glyphosate, iodosulfuron-methyl-Na, mesosulfuron-methyl, and penoxsulam 17 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane17115
13 GreeceGreece 2012 Grapes, Olive, and Orchards glyphosate 19 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane5691
14 JapanJapan 1986 Mulberry, Orchards, and Roadsides diquat, and paraquat 25 PS I Electron Diversion (D/22)
65Conyza sumatrensisSumatran Fleabane126
15 MalaysiaMalaysia 1990 Vegetables paraquat 28 PS I Electron Diversion (D/22)
65Conyza sumatrensisSumatran Fleabane138
16 ParaguayParaguay 2017 Soybean chlorimuron-ethyl, glyphosate, and paraquat 46 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PS I Electron Diversion (D/22)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane18153
17 SpainSpain 2009 Orchards glyphosate 38 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane5481
18 Sri LankaSri Lanka 1998 Tea paraquat 39 PS I Electron Diversion (D/22)
65Conyza sumatrensisSumatran Fleabane1184
19 TaiwanTaiwan 1980 Cropland, Railways, and Roadsides paraquat 42 PS I Electron Diversion (D/22)
65Conyza sumatrensisSumatran Fleabane214
20 TurkeyTurkey 2019 Peaches glyphosate 71 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
65Conyza sumatrensisSumatran Fleabane18164
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Friday, November 26, 2021 .  Available  www.weedscience.org
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