<b>HRAC Group 5</b> <font size='2'> (Legacy C1 C2) </font> resistant Arenaria serpyllifolia from France

INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

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

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

France

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
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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

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AREAS FOUND

Jacques Gasquez

We can't seem to find this biotype anymore - it has disapeared from the field!

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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.

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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.

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Herbicide Resistant Thymeleaf Sandwort Globally
(Arenaria serpyllifolia)

Country

FirstYear

Situation

Active Ingredients

Site of Action

France

1980

Corn (maize), and Cropland

atrazine

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

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Heap, I. The International Herbicide-Resistant Weed Database. Online. Sunday, November 24, 2024 . Available www.weedscience.org Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.