International Survey of Herbicide-Resistant Weeds

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HRAC GROUP 22 (LEGACY D) RESISTANT SUMATRAN FLEABANE
(Conyza sumatrensis)


PS I Electron Diversion HRAC Group 22 (Legacy D)

Japan, Saitama
INTRODUCTION SUMATRAN FLEABANE
Sumatran Fleabane (Conyza sumatrensis) is a dicot weed in the Asteraceae family.  In Japan this weed first evolved resistance to Group 22 (Legacy D) herbicides in 1986 and infests Mulberry, Orchards, and Roadsides.   Group 22 (Legacy D) herbicides are known as PS I Electron Diversion (PSI Electron Diversion ).  Research has shown that these particular biotypes are resistant to diquat, and paraquat and they may be cross-resistant to other Group 22 (Legacy D) 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 Dec 29, 2013 )

Common NameSumatran Fleabane
SpeciesConyza sumatrensis
GroupPS I Electron Diversion HRAC Group 22 (Legacy D)
Herbicidesdiquat, and paraquat
LocationJapan, Saitama
Year1986
Situation(s)Mulberry, Orchards, and Roadsides
Contributors - (Alphabetically)Yasutumi Imai, Kazuyuki Itoh, Satoshi Iwakami, and Akira Uchino 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Yasutumi Imai
Mulberry crop. Found in orchards and on riverbanks.

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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory 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 22 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 22 (Legacy D) resistant Sumatran Fleabane from Japan please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

YASUTUMI IMAI
Dow Agrosciences Japan
Dow Agrosciences
30500 Doe Circle
Tokyo
Japan
KAZUYUKI ITOH
Professor
Kobe University
Graduate School of Agricultural Science
1-1 Rokkodaicho
Kobe, 657-0013, Hyogo
Japan
Email Kazuyuki Itoh
SATOSHI IWAKAMI
Weed Scientist
University of Tsukuba
Faculty of Life and Environmental Sciences
1-1-1 Tennoudai
Tsukuba, 305-8577, Ibaraki
Japan
Email Satoshi Iwakami
AKIRA UCHINO
Weed Scientist
NARO Agricultural Research Center
Faculty of Life and Environmental Sciences
3-1-1 Kannondai
Tsukuba, 305-8666, Ibaraki
Japan
Email Akira Uchino

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Japan have been instrumental in providing you this information. Particular thanks is given to Yasutumi Imai, Kazuyuki Itoh, Satoshi Iwakami, and Akira Uchino 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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