Antagonist activity of Trichoderma harzianum against Sclerotinia sclerotiorum from common bean

Daniel Diego Costa Carvalho, Paulo Henrique Pereira Costa Muniz, Irene Martins, Thiago Alves Santos de Oliveira, Sueli Corrêa Marques Mello

Resumo


A key point in the development of new biopesticides is the discovery of strains with greater activity or more adapted to the environmental conditions under which such products are used. Thus, there is need to maintain a continuous flow of characterization and assessment of biocontrol agents. Therefore, five Brazilian Trichoderma harzianum isolates were evaluated in vitro against Sclerotinia sclerotiorum, the causal agent of the white mold of common bean. Initially, the isolates grown with the pathogen by paired culture and antibiosis assays. Light microscopy studies showed mycoparasitism by isolate CEN316 on S. sclerotiorum hyphae. Besides, reductions in the mycelial growth of S. sclerotiorum were verified with non-volatile metabolites of T. harzianum, wherein CEN287 and CEN316 inhibited the pathogen growth in 95% and 90% respectively. In vitro results, credit such isolates as potential holders in the development of soil inhabitant pathogens biological control program.

Palavras-chave


controle biológico, antibiose, mofo branco, Phaseolus vulgaris

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Direitos autorais 2019 Acta Iguazu

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Revista Acta Iguazu


ISSN 2316-4093 (versão eletrônica)

Unioeste - Universidade Estadual do Oeste do Paraná
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