INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 5 (LEGACY C1 C2) RESISTANT PROSTRATE KNOTWEED
(Polygonum aviculare)


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

Netherlands
INTRODUCTION PROSTRATE KNOTWEED
Prostrate Knotweed (Polygonum aviculare) is a dicot weed in the Polygonaceae family.  In Netherlands this weed first evolved resistance to Group 5 (Legacy C1 C2) herbicides in 1987 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 NameProstrate Knotweed
SpeciesPolygonum aviculare
GroupPSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
Herbicidesatrazine
LocationNetherlands
Year1987
Situation(s)Corn (maize), and Cropland
Contributors - (Alphabetically) 
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NOTES ABOUT THIS BIOTYPE

GENERAL

Homer LeBaron. 1991. Distribution and Seriousness of Herbicide-Resistant Weed Infestations Worldwide. In: Herbicide Resistance in Weeds and Crops. Oorschot, J. L. P. van//Straathof, H. J. M. 1989. On the occurrence and distribution of chlorplastic resistance of weeds to triazines in the Netherlands.

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Prostrate Knotweed biotype with this Prostrate Knotweed 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 Prostrate Knotweed 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 Prostrate Knotweed from Netherlands 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 Netherlands have been instrumental in providing you this information. 
Herbicide Resistant Prostrate Knotweed Globally
(Polygonum aviculare)
Herbicide Resistant Prostrate Knotweed Globally
(Polygonum aviculare)
Drag a column header and drop it here to group by that column
Herbicide Resistant Prostrate Knotweed Globally
(Polygonum aviculare)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BelgiumBelgium 1984 Apples amitrole 3 Inhibition of Lycopene Cyclase ( HRAC Group 34 (Legacy F3)
131Polygonum aviculareProstrate Knotweed40
2 NetherlandsNetherlands 1987 Corn (maize), and Cropland atrazine 43 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2)
131Polygonum aviculareProstrate Knotweed293
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