International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 5 (LEGACY C1 C2) RESISTANT LATEFLOWERING GOOSEFOOT
(Chenopodium album var. striatum (=C. strictum var. glaucophyllum))


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

Canada, Ontario
INTRODUCTION LATEFLOWERING GOOSEFOOT
Lateflowering Goosefoot (Chenopodium album var. striatum (=C. strictum var. glaucophyllum)) is a dicot weed in the Chenopodiaceae family.  In Ontario this weed first evolved resistance to Group 5 (Legacy C1 C2) herbicides in 1976 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 Dec 28, 2000 )

Common NameLateflowering Goosefoot
SpeciesChenopodium album var. striatum (=C. strictum var. glaucophyllum)
GroupPSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Herbicidesatrazine
LocationCanada, Ontario
Year1976
Situation(s)Corn (maize), and Cropland
Contributors - (Alphabetically)Clarence Swanton 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Clarence Swanton
Brant county

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GENERAL

Hugh Beckie
S. I. Warwick, V. Souza Machado, P. B. Marriage, and J. D. Bandeen. 1979. Resistance of Chenopodium strictum Roth (Late-Flowering Goosefoot) to atrazine. Can. J. Plant Sci. 59:269-270. Also: S. I. Warwick and L. Black. 1981. The relative competitiveness of atrazine susceptible and resistant populations of Chenopodium album and C. strictum. Can. J. Bot. 59:689-693.

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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Lateflowering Goosefoot biotype with this Lateflowering 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 Lateflowering 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 Lateflowering Goosefoot from Ontario please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

CLARENCE SWANTON
University Of Guelph
Dept. Of Crop Science
Ontario Agricultural College
PO Box 249
Guelph, N1G 2W1, Ontario
Canada
Email Clarence Swanton

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Ontario have been instrumental in providing you this information. Particular thanks is given to Clarence Swanton for providing detailed information.
Herbicide Resistant Lateflowering Goosefoot Globally
(Chenopodium album var. striatum (=C. strictum var. glaucophyllum))
Herbicide Resistant Lateflowering Goosefoot Globally
(Chenopodium album var. striatum (=C. strictum var. glaucophyllum))
Drag a column header and drop it here to group by that column
Herbicide Resistant Lateflowering Goosefoot Globally
(Chenopodium album var. striatum (=C. strictum var. glaucophyllum))
#CountryFirstYearSituationActive IngredientsSite of Action
1 Canada (Ontario) CanadaOntario1976 Corn (maize), and Cropland atrazine 7 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
51Chenopodium album var. striatum (=C. strictum var. glaucophyllum)Lateflowering Goosefoot60
2 Czech RepublicCzech Republic 1989 Corn (maize), and Sugar beets atrazine, lenacil, prometryne, simazine, and terbutryne 12 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
51Chenopodium album var. striatum (=C. strictum var. glaucophyllum)Lateflowering Goosefoot79
3 United States (Michigan) United StatesMichigan2004 Corn (maize), and Soybean atrazine 45 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
51Chenopodium album var. striatum (=C. strictum var. glaucophyllum)Lateflowering Goosefoot5288
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