Please find some useful links on the topic of herbicide resistance:

1. Herbicide Resistance Action Committee (HRAC)

https://www.hracglobal.com/ 

2. Weed Science Society of America (WSSA)

https://wssa.net/ 

3. International Herbicide-Resistant Weed Database 

http: /www.weedscience.org/Home.aspx

4. EPPO Resistance Database

https://resistance.eppo.int/ 

5. Maps of Herbicide Resistance in France: 

https://www.r4p-inra.fr/fr/mise-a-jour-des-cartes-resistance-aux-herbicides 

Criteria for Weed Resistance Population Validation:

Please find HERE a PDF file with an overview of useful documents on this topic.