Abstract

SADANOSKI, Marcela A. et al. Antagonistic capacities of Tríchoderma species and their mass multiplication with agricultural wastes. Rev. cienc. tecnol. [online]. 2018, n.30, pp.1-10. ISSN 1851-7587.

The aim of this research was to isolate and characterize Tríchoderma native strains from Misiones (Argentina) exploring their antagonistic capacities to phytopatogens fungi and their mass multiplication using different agricultural wastes. Fifteen native strains of Tríchoderma spp. were isolated from soil samples. These isolates were characterized via morphological observations and molecular phylogenetic analysis based on DNA sequences of the rDNA internal transcribed spacer region. The Tríchoderma native strains were identified as T. koningiopsis, T. harzianum, T. pleuroticola and T. brevicompactum. All strains showed antagonistic activities in vitro against Alternaría sp., Fusaríum sp. and Botrytis sp. T. koningiopsis LBM 090, LBM 091, LBM 092, and LBM 098 strains, T. pleuroticola LBM 097 and T. harzianum LBM 096 presented radial mycelial growth inhibition higher than 50% and antagonism index between 3 and 4 against the phytopathogens assayed. Among the different substrate sources evaluated, rice husk and rice polishing were the most suitable combination for mass multiplication of T. harzianum LBM 096.

Keywords : Biological control agent; Soil; Phytopatogens fungi; Rice husk; Rice polishing.

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