HRAC GROUP 5 (LEGACY C1 C2) RESISTANT THYMELEAF SANDWORT
(Arenaria serpyllifolia)

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

France

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INTRODUCTION THYMELEAF SANDWORT Thymeleaf Sandwort (Arenaria serpyllifolia) is a dicot weed in the Caryophyllaceae 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.

QUIK STATS (last updated Sep 15, 2000 ) Common Name Thymeleaf Sandwort Species Arenaria serpyllifolia Group PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2) Herbicides atrazine Location France Year 1980 Situation(s) Corn (maize), and Cropland Contributors - (Alphabetically) Jacques Gasquez  Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE AREAS FOUND Jacques Gasquez This species was resistant on railways near Paris. we only received one population so it is impossible to have any idea of the spread of this biotype Edit this Note  |  Add New Note   AREAS FOUND Jacques Gasquez We can't seem to find this biotype anymore - it has disapeared from the field! Edit this Note  |  Add New Note

ACADEMIC ASPECTS Confirmation Tests Greenhouse trials comparing a known susceptible Thymeleaf Sandwort biotype with this Thymeleaf Sandwort 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 Thymeleaf Sandwort 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 Thymeleaf Sandwort from France please update the database.   Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

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 Thymeleaf Sandwort Globally (Arenaria serpyllifolia) Herbicide Resistant Thymeleaf Sandwort Globally (Arenaria serpyllifolia) Drag a column header and drop it here to group by that column Herbicide Resistant Thymeleaf Sandwort Globally (Arenaria serpyllifolia) # Country Country StateName FirstYear Situation Active Ingredients CountryID Site of Action WeedID Species CommonName ResistID 1 France France   1980 Corn (maize), and Cropland atrazine 17 PSII inhibitors - Serine 264 Binders ( HRAC Group 5 (Legacy C1 C2) 22 Arenaria serpyllifolia Thymeleaf Sandwort 456

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