Comparison of the resistance of Norway spruce (Picea abies [L.] Karst.) in secondary pure spruce and mixed species stands against bark beetles (Coleoptera, Scolytidae) and the associated blue stain fungus Ceratocystis polonica (Siem.) C. Moreau : Forest Ecosystem Restoration. Ecological and Economical Impacts of Restoration Processes in Secondary Coniferous Forests

2000

S. 49-53

5 Abb., 11 Lit.

Unselbständiges Werk

200072801

Defence mechanisms in Norway spruce were compared between trees growing in forest stands with contrasting structure and species composition. Primary resin flow rate, wound reaction after low density inoculation with Ceratocystis polonica and resin flow after inoculation were related to resin duct density and monoterpene content of the bark. The effects of tree growth on constitutive and induced defence and the interaction with forest restoration measurements are discussed.