Author(s): GOBBI, P. C.; MATTOS, M. L. T.

Summary: Abstract: The study evaluated the compatibility, in vitro, of diazotrophs Bradyrhizobium spp., and plant growth-promoting bacteria (PGPB), Azospirillum brasilense and Bacillus spp., widely used as biofertilizers and biostimulantion soybean culture combined with as biofungicides/bionematicides Trichoderma harzianum and Trichoderma asperellum. Compatibility was evaluated through antagonistic activity and the minimum inhibitory concentration (MIC), using the techniques of dual cultures and disc diffusion, respectively. The experiment was conducted at the soil microbiology laboratory out at the Embrapa Temperate Climate, Pelotas, RS, Brazil. We adopted a completely randomized design (CRD) with three replications and the data were submitted to ANOVA followed by Tukey's test (p?0.05) for compare of the mycelial growth variables, that showed significant difference. B. elkanii strain SEMIA.587 was compatible with all accessions of Trichoderma spp. A. brasilense strains Ab-V5 and Ab-V6, were compatible with the T. asperellum accession UFRA.T09. B. elkanii strain SEMIA.5019, B. japonicum strain SEMIA.5079 and B. diazoefficiens strain SEMIA.5080, B. subtilis strain CNPMS.B2084 and B. megaterium strain CNPMS.B119 inhibited from 47% to 83% the growth of Trichoderma spp. The MIC demonstrated that diazotrophs and PGPB are not sensitive to Trichoderma spp. B. elkanii strain SEMIA.587 can be used in combination with all Trichoderma spp. accessions, as well as the Ab-V5 and Ab-V6 strains of A. brasilense with the T. asperellum accession UFRA.T09 in the inoculation via a seeding furrow.

Publication year: 2024

Types of publication: Journal article

Unit: Embrapa Temperate Agriculture

Keywords: Biofungicidas, Biofungicide, Dual cultures, Estirpe, MIC, PGPB, Soja, Strains