Most plant pathogens present complex life cycles, in which the clonal reproduction may impede the delimitation of population entities. By studying the genetic structure of the wheat yellow rust caused by Puccinia striiformis f.sp. tritici (PST), we highlighted difficulties impeding population delimitation in highly clonal species. Despite the high dispersal potential of PST, southern France isolates were shown to be divergent...

We designed and implemented an action–research programme in large‐scale irrigation schemes in Algeria, Morocco and Tunisia, aiming to develop a regional network of competences by conducting research, training and development activities, and involving local actors. We worked on three issues: (i) the sustainability of North Africa's growing groundwater economy, (ii) the integration of environmental constraints in the management...