| Abstract: | Investigations on biological control of Heterobasidion annosum in Norway spruce with antagonistic fungi. II. Interaction experiments in wood . Seventeen fungal species were examined for antagonism against H. annosum in wood. After inoculation of stem sections and stumps by conidia and dowels, the distribution patterns of the mycelia within the wood were recorded. In spruce-wood antagonism was shown only by Hypholoma capnoides, Bjcrkandera adusta, Resinicium bicolor and Trichoderma spp. near the site of inoculation. As the distance from this site increased H. annosum became more dominant. Inoculations by dowels yielded more infections than inoculations by spores. The patterns of myeelial distribution within the wood were similar in stem sections and in stumps. Spruce stumps were colonized naturally mainly by Resinicium bicolor, Armillaria mellea s. I. and Nectria fuckeliana. In stem sections of Pinus sylvestris, however, Phlebiopsis gigantea displaced H. annosum effectively. |
