Internal decay caused by basidiomycetes in standing creosoted poles can be controlled biologically, it seems, by artificial inoculation near the ground line. For such inoculation IC-type facultative mycoparasites, Scytalidium sp FY strain or Trichoderma spp for example, may be used. Apparent residual action can be explained by the release of non water soluble chemically stable antibiotics from the growing hyphae of the artificially planted micro-organism.

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