International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT LOW FALSE-PIMPERNEL
(Lindernia dubia (=Lindernia dubia var. major))


ALS inhibitors (B/2)

Japan, Yamagata, Miyagi
INTRODUCTION LOW FALSE-PIMPERNEL
Low False-pimpernel (Lindernia dubia (=Lindernia dubia var. major)) is a dicot weed in the Scrophulariaceae family.  In Japan this weed first evolved resistance to Group B/2 herbicides in 1995 and infests Rice.   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 bensulfuron-methyl, and imazosulfuron 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 Jan 11, 2014 )

Common NameLow False-pimpernel
SpeciesLindernia dubia (=Lindernia dubia var. major)
GroupALS inhibitors (B/2)
Herbicidesbensulfuron-methyl, and imazosulfuron
LocationJapan, Yamagata, Miyagi
Year1995
Situation(s)Rice
Contributors - (Alphabetically)Kazuyuki Itoh 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Kazuyuki Itoh
Northern Japan

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GENERAL

Kazuyuki Itoh
Itoh et al.1997.

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GENERAL

Kazuyuki Itoh
Uchino et al. 1997. Also now writing an English paper.

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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Low False-pimpernel biotype with this Low False-pimpernel 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 Low False-pimpernel 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 Low False-pimpernel from Japan please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

KAZUYUKI ITOH
Professor
Kobe University
Graduate School of Agricultural Science
1-1 Rokkodaicho
Kobe, 657-0013, Hyogo
Japan
Email Kazuyuki Itoh

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 Kazuyuki Itoh for providing detailed information.
Herbicide Resistant Low False-pimpernel Globally
(Lindernia dubia (=Lindernia dubia var. major))
Herbicide Resistant Low False-pimpernel Globally
(Lindernia dubia (=Lindernia dubia var. major))
Drag a column header and drop it here to group by that column
Herbicide Resistant Low False-pimpernel Globally
(Lindernia dubia (=Lindernia dubia var. major))
#CountryFirstYearSituationActive IngredientsSite of Action
1 JapanJapan 1995 Rice bensulfuron-methyl, and imazosulfuron 25 ALS inhibitors (B/2)
106Lindernia dubia (=Lindernia dubia var. major)Low False-pimpernel539
2 South KoreaSouth Korea 2000 Rice azimsulfuron, bensulfuron-methyl, cinosulfuron, cyclosulfamuron, ethoxysulfuron, halosulfuron-methyl, imazosulfuron, and pyrazosulfuron-ethyl 27 ALS inhibitors (B/2)
106Lindernia dubia (=Lindernia dubia var. major)Low False-pimpernel5132
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Friday, September 20, 2019 .  Available  www.weedscience.org
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