Monitoring of Venturia inaequalis virulences

Results

The results of the monitoring are published once a year through this homepage in the form a downloadable pdf.
MOST RECENT DATA (currently 2009-2025) can be downloaded HERE

MOST RECENT DATA, 2009-2025 (PDF)

Red cells: scab lesions detected on the differential host (at least one tree with a score > 2 observed), the resistance is overcome in that year and location

Orange cells: few scab lesions detected on the differential host (all the trees have a maximal score = 2), the resistance gene may be overcome in that year and location

The evaluation scale used to measure the severity is adapted from Lateur and Populer (1994)