International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
MULTIPLE RESISTANT WOODY BORRERIA
(Hedyotis verticillata)


Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)

Malaysia, Terengganu
INTRODUCTION WOODY BORRERIA
Woody borreria (Hedyotis verticillata) is a dicot weed in the Rubiaceae family.  In Malaysia this weed first evolved multiple resistance (to 2 herbicide sites of action) in 2005 and infests Palm oil.  Multiple resistance has evolved to herbicides in the Groups D/22, and G/9.  These particular biotypes are known to have resistance to glyphosate, and paraquat and they may be cross-resistant to other herbicides in the Groups D/22, and G/9.

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 27, 2014 )

Common NameWoody borreria
SpeciesHedyotis verticillata
GroupPSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
Herbicidesglyphosate, and paraquat
LocationMalaysia, Terengganu
Year2005
Situation(s)Palm oil
Contributors - (Alphabetically)Chuah Tse-Seng 
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NOTES ABOUT THIS BIOTYPE

DOSE RESPONSE

Chuah Tse-Seng

PARAQUAT AND GLYPHOSATE RESISTANCE IN WOODY BORRERIA (HEDYOTIS VERTICILLATA) GROWING AT OIL PALM PLANTATIONS IN TERENGGANU, MALAYSIA
CHUAH, T.S.1, NOOR-ZALILA, M.R.2, CHA, T.S.2 and ISMAIL, B.S.3*
1Faculty of Agrotechnology and Food Science,
2Faculty of Science and Technology,
Kolej Universiti Sains danTeknologi Malaysia, Mengabang Telipot (KUSTEM),
21030, KualaTerengganu, Terengganu, Malaysia
3School of Environmental and Natural Resource Sciences,
Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor Malaysia

ABSTRACT

Glyphosate- and paraquat-resistant and susceptible biotypes of Hedyotis verticillata (woody borreria) infesting oil palm plantations of Terengganu, Malaysia, belonging to the Federal Land Consolidation and Rehabilitation Authority (FELCRA), Bukit Sudu, FELCRA Bukit Kapah, and the Federal Land Development Authority (FELDA), Belara, Kuala Terengganu were screened in a greenhouse study. Dose-response tests conducted using 3- to 4-leaf plants revealed that H. verticillata from oil palm plantations of FELCRA Bukit Kapah and FELDA Belara have developed multiple-resistance towards both glyphosate and paraquat. The paraquat resistance biotype of H. verticillata was detected in oil palm plantations of FELCRA Bukit Sudu. Comparison of concentrations of herbicides required to kill 50% (ED50 value) of the population indicated that the resistant biotypes of H. verticillata are between 2 to 4- fold more resistant than their respective susceptible biotypes.

Malays. Appl. Biol. (2005) 34(2): 43–49

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Woody borreria biotype with this Woody borreria 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 D, G/22, 9 resistant Woody borreria 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 Woody borreria from Malaysia please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

CHUAH TSE-SENG
Lecturer
Universiti Malaysia Terengganu
Department Of Agrotechnology
Faculty Of Agrotechnology & Food Science
Kuala Terengganu, 21030, Terengganu
Malaysia
Email Chuah Tse-Seng

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Malaysia have been instrumental in providing you this information. Particular thanks is given to Chuah Tse-Seng for providing detailed information.
Herbicide Resistant Woody borreria Globally
(Hedyotis verticillata)
Herbicide Resistant Woody borreria Globally
(Hedyotis verticillata)
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Herbicide Resistant Woody borreria Globally
(Hedyotis verticillata)
#CountryFirstYearSituationActive IngredientsSite of Action
1 MalaysiaMalaysia 2005 Palm oil glyphosate, and paraquat 28 Multiple Resistance: 2 Sites of Action
PSI Electron Diverter (D/22)
EPSP synthase inhibitors (G/9)
310Hedyotis verticillataWoody borreria7872
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, September 25, 2017 .  Available  www.weedscience.org
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