The effectiveness of Trichoderma longibranchiatum (UFV-1), T. inhamatum (UFV-2 and UFV-3), eucalyptus bark compost and leaves of eucalyptus was tested for the suppression of Rhizoctonia spp. in the soil of a clonal hedge of eucalyptus under controlled conditions. Soils artificially infested with Rhizoctonia spp., the antagonists UFV-2 and UFV-3 showed high levels of suppression of the pathogen when the feeding formulation rose from 5 to 50 g wheat bran per liter. However, in the field, the antagonist UFV-3 did not show a significant effect in reducing the inoculum of Rhizoctonia spp. Eucalypt us bark compost resulted in different levels of suppression of the pathogen depending on the compost pile and source. Adding eucalyptus leaves to the soil favored the inoculum of Rhizoctonia spp.
