International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 5 (LEGACY C1 C2) RESISTANT WILD BUCKWHEAT
(Polygonum convolvulus (=Fallopia convolvulus))


PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)

Germany
INTRODUCTION WILD BUCKWHEAT
Wild Buckwheat (Polygonum convolvulus (=Fallopia convolvulus)) is a dicot weed in the Polygonaceae family.  In Germany this weed first evolved resistance to Group 5 (Legacy C1 C2) herbicides in 1988 and infests Corn (maize).   Group 5 (Legacy C1 C2) herbicides are known as PSII inhibitors - Serine 264 Binders (Inhbition of Photosynthesis at PSll - Serine 264 Binders ).  Research has shown that these particular biotypes are resistant to atrazine and they may be cross-resistant to other Group 5 (Legacy C1 C2) 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 Sep 15, 2000 )

Common NameWild Buckwheat
SpeciesPolygonum convolvulus (=Fallopia convolvulus)
GroupPSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Herbicidesatrazine
LocationGermany
Year1988
Situation(s)Corn (maize)
Contributors - (Alphabetically) 
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NOTES ABOUT THIS BIOTYPE

GENERAL

Kees-H (1988). The development of triazine-resistant annual weeds in Bavaria and experience with their control. Die Entwicklung triazinresistenter Samenunkrauter in Bayern und Erfahrungen mit deren Bekampfung. Gesunde-Pflanzen. 1988, 40: 10, 407-412, 414.

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Wild Buckwheat biotype with this Wild Buckwheat 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 5 resistant Wild Buckwheat 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 5 (Legacy C1 C2) resistant Wild Buckwheat from Germany please update the database.
 
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CONTRIBUTING WEED SCIENTISTS


ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Germany have been instrumental in providing you this information. 
Herbicide Resistant Wild Buckwheat Globally
(Polygonum convolvulus (=Fallopia convolvulus))
Herbicide Resistant Wild Buckwheat Globally
(Polygonum convolvulus (=Fallopia convolvulus))
Drag a column header and drop it here to group by that column
Herbicide Resistant Wild Buckwheat Globally
(Polygonum convolvulus (=Fallopia convolvulus))
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (Queensland) AustraliaQueensland1993 Wheat chlorsulfuron 1 Inhibition of Acetolactate Synthase (B/2)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat9
2 AustriaAustria 1980 Corn (maize) atrazine 2 PSII inhibitors - Serine 264 Binders (C1 C2/5)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat434
3 Canada (Alberta) CanadaAlberta2007 Peas, and Wheat florasulam, thifensulfuron-methyl, and tribenuron-methyl 7 Inhibition of Acetolactate Synthase (B/2)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat5379
4 GermanyGermany 1988 Corn (maize) atrazine 18 PSII inhibitors - Serine 264 Binders (C1 C2/5)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat446
Literature about Similar Cases

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