Antagonistic capacities of Trichoderma species and their mass multiplication with agricultural wastes

SADAÑOSKI, MARCELA; GUTIERREZ BROWER, JIMENA; CASTRILLO, LORENA; LOPEZ, ANA CLARA; OJEDA, PAOLA; ZAPATA, PEDRO; VILLALBA, LAURA; OTEGUI, MÓNICA

REVISTA DE CIENCIA Y TECNOLOGíA

CENTRO DE INVESTIGACIÓN Y DESARROLLO TECNOLÓGICO, FACULTAD DE CIENCIAS EXACTAS, QUÍMICAS Y NATURALES, UNIVERSIDAD NACIONAL DE MISIONES

Lugar: Posadas; Año: 2018

0329-8922

Trichoderma is a well-known genus because of its biocontrol and plant growth promoting properties. Consequently, it can replace the use of agrochemical and fertilizers reducing the environmental contamination and health concerns. The aim of this research was to isolate and characterize native strains from Misiones (Argentina) exploring their biological control and plant growth capability. Fifteen native strains of Trichoderma spp. were selectively isolated from soil samples collected from natural areas with low human impact in the province. To evaluate their capability as biological control agents (BCA), a number of antagonism tests of Trichoderma species against phytophatogenic fungi and diffused assays of secondary metabolites were carried out. To evaluate the plant growth promoting propierties, Lycopersicon esculentum (tomato) seeds and Stevia rebaudiana Bert plants were inoculated with Trichoderma spores. From all strains tested, T. harzianum LBM096 presented the most effective antagonism against phytopathogens and was the best plant growth promoting fungal species. The formulation of rice husk and rice polishing resulted as the best suitable combination of substrates to increase the mass production.