The objective of this study was to evaluate the efficacy of antifungal metabolites from Streptomyces rimosus for controlling the growth of sapwood-inhabiting fungi: sapstain fungi - Ceratocystis coerulescens, Ceratocystis minor, Ceratocystis pilifera, and Aureobasidum pullulans; mold fungi - Aspergillus niger, Penicillium spp, and Trichoderma spp. Production of antifungal metabolites by Streptomyces rimosus was studied using petri plate assay, plate bio-assay, wood-block tests, and green pine log sections. The metabolites inhibited mycelial growth at a distance in petri plate assay; clear zones were exhibited around the wells in plate bio-assay. Treatment of Southern Pine and sweetgum blocks and green pine log sections with concentrated metabolites inhibited conidial germination and prevented discoloration.

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