Biological fungicide based on a strain of the fungus Trichoderma harzianum: its survival in the soil

Authors

  • Marina Stocco Centro de Investigaciones de Fitopatología (CIDEFI).Facultad de Ciencias Agrarias y Forestales Universidad Nacional de La Plata, La Plata. Buenos Aires. Argentina
  • Gladys Lampugnani Centro de Investigaciones en Protección Vegetal (CISAV), Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, La Plata. Buenos Aires. Argentina
  • Soledad Zuluaga Centro de Investigaciones en Protección Vegetal (CISAV), Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, La Plata. Buenos Aires. Argentina
  • Cecilia Abramoff Centro de Investigaciones en Protección Vegetal (CISAV), Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, La Plata. Buenos Aires. Argentina
  • Cristina Cordo Centro de Investigaciones de Fitopatología (CIDEFI).Facultad de Ciencias Agrarias y Forestales Universidad Nacional de La Plata, La Plata. Buenos Aires. Argentina; Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. (CICBA), Argentina
  • Cecilia Mónaco Centro de Investigaciones de Fitopatología (CIDEFI).Facultad de Ciencias Agrarias y Forestales Universidad Nacional de La Plata. Calle 60 y 119, La Plata. Buenos Aires. Argentina; Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. (CICBA), Argentina

DOI:

https://doi.org/10.24215/16699513e020

Keywords:

survival, biological input, antagonist, biological control

Abstract

An alternative to the indiscriminate use of phytosanitary products is the incorporation of competing antagonistic microorganisms for the protection of the crops of soil-borne pathogens. In this work the potentiality of the establishment of Trichoderma harzianum Rifai (strain Th5cc) in the soil under different formulations was evaluated, in order to know which is the most effective in maintaining the population of the antagonist at moderate levels. The population was quantified using the soil dilution plate technique with a selective medium for Trichoderma. The results show that both the liquid formulation and the coated seeds increase the Th5cc population until 90 days after the formula was incorporated into the soil (1.4 x 104 colony forming units / g of soil). In contrast, with the application of solid formula, the population of the antagonist begins to decrease after 90 days. In the case of incorporation in the seed, the population of T. harzianum at the beginning was lower than that of the control, but at 60 and 90 days they reached higher values than the original soil population (control). The efficiency of the application of T. harzianum as an antagonist in plants is closely related to its formulation, which clearly influences survival in the soil.

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Published

2019-12-27

How to Cite

Stocco, M., Lampugnani, G., Zuluaga, S., Abramoff, C., Cordo, C. ., & Mónaco, C. (2019). Biological fungicide based on a strain of the fungus Trichoderma harzianum: its survival in the soil. Journal of the Agronomy College, 118(2), 020. https://doi.org/10.24215/16699513e020