The Sub-Group “Collaborative Study on Blue Mould” was originally set up in 1964. Up until 2015, field trials (collaborative experiments on varieties) were carried out to look for cultivars more tolerant to the blue mould pathogen Peronospora tabacina.​

This document is the final report of the Sub-Group and covers the work done on the four main objectives established in 2008:

1. Collaborative Experiment on Varieties
2. Studying the Blue Mould Population
3. Work on Metalaxyl Sensitivity/Resistance
4. To liaise with AERET to continue the Blue Mould Warning Service