Abstract Seven living forest trees were inoculated with mycelia of Fomes pinicola isolated from hosts of various tree species. Ten years after inoculation the trees were felled, cut into sections and the development of decay studied. The fungus was able to cause decay in coniferous and non-coniferous hosts regardless of its source. The maximum decay was in red spruce, where it extended vertically approximately 8 feet.
Hirt et al. (1938) studied this question.