This web page hosts the latest guidance from the Weed Resistance Action Group (WRAG). The 'Download' button provides background. Scroll down for guidance.

The Weed Resistance Action Group (WRAG)

The AHDB-supported Resistance Action Groups (RAGs) are informal, UK-based groups consisting of experts from the Crop Protection Association (CPA) member companies, other representatives from the agrochemical industry, a range of independent organisations, including public-sector research institutes, and the Chemicals Regulation Directorate (CRD).The groups are completely independent of AHDB and work to produce guidance on pesticide resistance issues. As part of its support to the resistance action groups, AHDB publishes WRAG guidance.




  • Outlooks on Pest Management glyphosate special (December 2018). This issue features several key articles on glyphosate. It includes a paper by James Clarke, chairman of WRAG, which looks at the role of glyphosate and issues around protecting its efficacy.


In this video (above), AHDB's Paul Gosling describes the findings from AHDB research that investigates how farming practices can alter the risk of glyphosate resistance developing in UK grassweeds.


Black-grass (mainly)

Other grasses

Broad-leaved weeds