International Survey of Herbicide-Resistant Weeds

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


Photosystem II inhibitors (C1/5)

Austria
INTRODUCTION WILD BUCKWHEAT
Wild Buckwheat (Polygonum convolvulus (=Fallopia convolvulus)) is a dicot weed in the Polygonaceae family.  In Austria this weed first evolved resistance to Group C1/5 herbicides in 1980 and infests Corn (maize).   Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II).  Research has shown that these particular biotypes are resistant to atrazine and they may be cross-resistant to other Group C1/5 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.

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 Sep 15, 2000 )

Common NameWild Buckwheat
SpeciesPolygonum convolvulus (=Fallopia convolvulus)
GroupPhotosystem II inhibitors (C1/5)
Herbicidesatrazine
LocationAustria
Year1980
Situation(s)Corn (maize)
Contributors - (Alphabetically) 
Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE

GENERAL

R. Szith and H. Furlan. (1980). Der windenknoterich (Polygonum convolvulus L.), ein "neues" atrazinresistentes unkraut im maisbau. Der Pflanzenarzt, 33, 95. (L&G) Same as Fallopia convolvulus

Edit this Note  |  Add New Note
 

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 Group C1/5 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

Triazine resistant weeds often exhibit a lower relative fitness when compared to susceptible biotypes.  The most common mutation conferring triazine resistance (Ser 264 to Gly mutation of the psbA gene) also causes a reduction in CO2 fixation, quantum yield, and seed and biomass production.  There is no record in this database referring specifically to fitness studies on Group C1/5 resistant Wild Buckwheat from Austria.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS


ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Austria 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 ALS inhibitors (B/2)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat9
2 AustriaAustria 1980 Corn (maize) atrazine 2 Photosystem II inhibitors (C1/5)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat434
3 Canada (Alberta) CanadaAlberta2007 Peas, and Wheat florasulam, thifensulfuron-methyl, and tribenuron-methyl 7 ALS inhibitors (B/2)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat5379
4 GermanyGermany 1988 Corn (maize) atrazine 18 Photosystem II inhibitors (C1/5)
88Polygonum convolvulus (=Fallopia convolvulus)Wild Buckwheat446
Literature about Similar Cases

123
Page size:
select
Page: of 3
Items 1 to 5 of 14

123
Page size:
select
Page: of 3
Items 1 to 5 of 14
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.  Saturday, October 19, 2019 .  Available  www.weedscience.org
Copyright © 1993- 2019 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.