International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
MULTIPLE RESISTANT SUMATRAN FLEABANE
(Conyza sumatrensis)


Multiple Resistance: 5 Sites of Action
PSII inhibitor (Ureas and amides) (C2/7)
PSI Electron Diverter (D/22)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)

Brazil, Assis Chateaubriand-PR
INTRODUCTION SUMATRAN FLEABANE
Sumatran Fleabane (Conyza sumatrensis) is a dicot weed in the Asteraceae family.  In Brazil this weed first evolved multiple resistance (to 5 herbicide sites of action) in 2017 and infests Soybean.  Multiple resistance has evolved to herbicides in the Groups C2/7, D/22, E/14, G/9, and O/4.  These particular biotypes are known to have resistance to 2,4-D, diuron, glyphosate, paraquat, and saflufenacil and they may be cross-resistant to other herbicides in the Groups C2/7, D/22, E/14, G/9, and O/4.

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.

If we do not have a picture for this weed, or you can provide a better picture (scan, digital camera etc) please please e-mail it to us.

QUIK STATS (last updated Apr 13, 2018 )

Common NameSumatran Fleabane
SpeciesConyza sumatrensis
GroupPSII inhibitor (Ureas and amides) (C2/7)
PSI Electron Diverter (D/22)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
Herbicides2,4-D, diuron, glyphosate, paraquat, and saflufenacil
LocationBrazil, Assis Chateaubriand-PR
Year2017
Situation(s)Soybean
Contributors - (Alphabetically)Pedro Christoffoleti, Claudia De Oliveira, Jéssica Leal, Camila Pinho, Amanda Souza, and Luiz Zobiole 
Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS

Confirmation Tests

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 Group C2, D, E, G, O/7, 22, 14, 9, 4 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 multiple resistant Sumatran Fleabane from Brazil please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS

PEDRO CHRISTOFFOLETI
Associate Professor III
Universidade de Sao Paulo
Crop Science Department
ESALQ - USP - LPV - Av. Padua Dias 11 - C. Postal 09
Piracicaba, 13418-900, São Paulo
Brazil
Email Pedro Christoffoleti
Web   : Web Site Link
CLAUDIA DE OLIVEIRA
Research
Universidade federal Rural do Rio de Janeiro
Engenharia agrícola e ambiental
Br 465 km07
Seropédica , 23897000, Rio de Janeiro
Brazil
Email Claudia De Oliveira
Web   : Web Site Link
JÉSSICA LEAL
Master student
Federal Rural University of Rio de Janeiro
Department of Engineering
BR 465 Road
Km 07
Seropédica , 23897-000, Rio de Janeiro
Brazil
Email Jéssica Leal
Web   : Web Site Link
CAMILA PINHO
PROFESSOR
FEDERAL RURAL UNIVERSITY OF RIO DE JANEIRO
ENGINEERING
BR 465, km 7
SEROPEDICA, 23897-000, RIO DE JANEIRO
Brazil
Email Camila Pinho
Web   : Web Site Link
AMANDA SOUZA
Master student
Federal Rural University Rio de Janeiro
Departament of engineering
BR 465 KM 7
Seropédica , 23897-000, Rio de Janeiro
Brazil
Email Amanda Souza
Web   : Web Site Link
LUIZ ZOBIOLE
Field Scientist
Corteva Agriscience™ Agriculture Division of DowDuPont ™
Crop Protection R&D
Rod. SP 147 km 71

Mogi Migim, 13800-970 , São Paulo
Brazil
Email Luiz Zobiole
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Brazil have been instrumental in providing you this information. Particular thanks is given to Pedro Christoffoleti, Claudia De Oliveira, Jéssica Leal, Camila Pinho, Amanda Souza, and Luiz Zobiole 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 PSI Electron Diverter (D/22)
65Conyza sumatrensisSumatran Fleabane17148
2 BrazilBrazil 2010 Corn (maize), and Soybean glyphosate 5 EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane5577
3 BrazilBrazil 2011 Soybean chlorimuron-ethyl 5 ALS inhibitors (B/2)
65Conyza sumatrensisSumatran Fleabane5647
4 BrazilBrazil 2011 Corn (maize), and Soybean chlorimuron-ethyl, and glyphosate 5 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane5648
5 BrazilBrazil 2016 Soybean paraquat 5 PSI Electron Diverter (D/22)
65Conyza sumatrensisSumatran Fleabane16082
6 BrazilBrazil 2017 Soybean saflufenacil 5 PPO inhibitors (E/14)
65Conyza sumatrensisSumatran Fleabane17099
7 BrazilBrazil 2017 Soybean chlorimuron-ethyl, glyphosate, and paraquat 5 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane17102
8 BrazilBrazil 2017 Soybean 2,4-D, diuron, glyphosate, paraquat, and saflufenacil 5 Multiple Resistance: 5 Sites of Action
PSII inhibitor (Ureas and amides) (C2/7)
PSI Electron Diverter (D/22)
PPO inhibitors (E/14)
EPSP synthase inhibitors (G/9)
Synthetic Auxins (O/4)
65Conyza sumatrensisSumatran Fleabane17135
9 FranceFrance 2010 Grapes glyphosate 17 EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane9932
10 FranceFrance 2016 Grapes flazasulfuron, iodosulfuron-methyl-sodium, mesosulfuron-methyl, and penoxsulam 17 ALS inhibitors (B/2)
65Conyza sumatrensisSumatran Fleabane17114
11 FranceFrance 2016 Grapes flazasulfuron, glyphosate, iodosulfuron-methyl-sodium, mesosulfuron-methyl, and penoxsulam 17 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane17115
12 GreeceGreece 2012 Grapes, Olive, and Orchards glyphosate 19 EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane5691
13 JapanJapan 1986 Mulberry, Orchards, and Roadsides diquat, and paraquat 25 PSI Electron Diverter (D/22)
65Conyza sumatrensisSumatran Fleabane126
14 MalaysiaMalaysia 1990 Vegetables paraquat 28 PSI Electron Diverter (D/22)
65Conyza sumatrensisSumatran Fleabane138
15 SpainSpain 2009 Orchards glyphosate 38 EPSP synthase inhibitors (G/9)
65Conyza sumatrensisSumatran Fleabane5481
16 Sri LankaSri Lanka 1998 Tea paraquat 39 PSI Electron Diverter (D/22)
65Conyza sumatrensisSumatran Fleabane1184
17 TaiwanTaiwan 1980 Cropland, Railways, and Roadsides paraquat 42 PSI Electron Diverter (D/22)
65Conyza sumatrensisSumatran Fleabane214
Literature about Similar Cases

123
Page size:
select
Page: of 3
Items 1 to 5 of 11

123
Page size:
select
Page: of 3
Items 1 to 5 of 11
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, November 15, 2018 .  Available  www.weedscience.org
Copyright © 1993- 2018 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.