The fungi most frequently inhabiting thinning slash ofPinus radiata were isolated and recorded in a typical South Australian plantation. These includedStereum sanguinolentum, Peniophora sp. (undescribed, close toPeniophora pini),Schizophyllum commune, Coriolus sanguineus, Peniophora gigantea, Trichoderma viride, Penicillium sp.,Aureobasidium pullulans, Macrophoma sabinea andLeptographium spp. Antagonistic potentialities in vitro suggested that the less destructive of these deserve to be studied in the biological control ofS. sanguinolentum. Their occurrence might be manipulated by proper slash disposal sinceS. commune andPeniophora sp. were favored by moderate exposure andP. filamentosa andP. gigantea by protection from exposure. Very exposed slash was not occupied by any fungi.