Implementation: Effectiveness of sentinel (expatriate) concept is reported directly to MPI (Science & Risk – Plants & Pathways, Diagnostics & Surveillance Directorates (PHEL and SII), and Intelligence Planning and Coordination Directorate (Biosecurity Intelligence Team)) and International Plant Sentinel Network (Botanic Gardens Conservation International). Generic learning is shared with other sentinel projects (i.e. B17.4, B19.3). Specific information on biosecurity risk from Xylella will be shared with the MPI, DOC and the GIA Xylella Working Group.