International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 5 (LEGACY C1 C2) RESISTANT MANYSEEDED GOOSEFOOT
(Chenopodium polyspermum)


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

France
INTRODUCTION MANYSEEDED GOOSEFOOT
Manyseeded Goosefoot (Chenopodium polyspermum) is a dicot weed in the Chenopodiaceae family.  In France this weed first evolved resistance to Group 5 (Legacy C1 C2) herbicides in 1980 and infests Corn (maize), and Cropland.   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 NameManyseeded Goosefoot
SpeciesChenopodium polyspermum
GroupPSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Herbicidesatrazine
LocationFrance
Year1980
Situation(s)Corn (maize), and Cropland
Contributors - (Alphabetically)Jacques Gasquez 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Jacques Gasquez
Chenopodium polyspermum was resistant in only one farm in Brittany. Very quickly the farmer no longer grew corn in his fields and this biotype disappeared in few years. ten years ago we found only few individuals in the farmyard. It seems that today, they have also disappeared

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AREAS FOUND

Jacques Gasquez
Quite rare, not really a problem!

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Manyseeded Goosefoot biotype with this Manyseeded Goosefoot 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 Manyseeded Goosefoot 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 Manyseeded Goosefoot from France please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

JACQUES GASQUEZ
Inra
Laboratoire De Malherbologie
702 Hickory Ct
Dijon, 21034, Cedex
France
Email Jacques Gasquez

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in France have been instrumental in providing you this information. Particular thanks is given to Jacques Gasquez for providing detailed information.
Herbicide Resistant Manyseeded Goosefoot Globally
(Chenopodium polyspermum)
Herbicide Resistant Manyseeded Goosefoot Globally
(Chenopodium polyspermum)
Drag a column header and drop it here to group by that column
Herbicide Resistant Manyseeded Goosefoot Globally
(Chenopodium polyspermum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 FranceFrance 1980 Corn (maize), and Cropland atrazine 17 PSII inhibitors - Serine 264 Binders (C1 C2/5)
50Chenopodium polyspermumManyseeded Goosefoot459
2 GermanyGermany 1988 Corn (maize) atrazine 18 PSII inhibitors - Serine 264 Binders (C1 C2/5)
50Chenopodium polyspermumManyseeded Goosefoot444
3 SwitzerlandSwitzerland 1982 Corn (maize) atrazine 41 PSII inhibitors - Serine 264 Binders (C1 C2/5)
50Chenopodium polyspermumManyseeded Goosefoot202
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