Tree-to tree variation on Picea abies in growth inhibition against Fomes annosus

The spread of Fomes annosus was measured on a set of 20 mature trees which were artificial inoculated. These observations were compared with growth observations and laccase activity of F. annosus grown on wood dust from the same 20 trees. Although variation between Fomes strains as well as between trees was recorded, correspondance between field and laboratory observations was absent in the present material.