BIOCONTROL OF Macrophomina phaseolina WITH Trichoderma SPECIES APPLIED TO BEAN SEEDS AND SOIL TREATMENTS

Abstract

Four species of Trichoderma (T. harzianum, T. koningii, T. viride and T. pseudokoningii) were evaluatedunder greenhouse conditions using two methods: a) Treatment of bean seeds with a conidialsuspension of the antagonists, adjusted to 1x10e conidia/ml of sterilized water, and planting innatural and sterilized soils, which were artificially infested with M. phaseolina in three differentperiods, in relation to the planting of the treated seeds; b) Treatment of both kinds of soil withthe antagonists, following the same periods of applying, in relation to the planting of theinoculated seeds with phytopathogen. In general, Trichoderma species showed potential asbiocontrol agents of M. phaseolina. Among the studied species, T. harzianum revealed the bestAnais da Academia Pernambucana de Ciência Agronômica, vol. 1, p.133-140, 2004.BIOCONTROLE DE Macrophomina phaseolina COM ESPÉCIES DE Trichoderma APLICADAS NOTRATAMENTO DE SEMENTES DE FEIJÃO E NO SOLO134results for both, seed and soil treatments, as indicated by higher Ievel of plant survival.