Identificación de especies de cepas nativas de Trichoderma sp. y Bacillus sp. y evaluación de su potencial antagonista in vitro frente al hongo fitopatógeno nativo Moniliophthora roreri en el departamento de Norte de Santander

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Liliana Yanet-Suárez ; Claudia Patricia Cabrales (2008)
  • Publisher: Universidad Francisco de Paula Santander
  • Journal: Respuestas (issn: 0122-820X, eissn: 2422-5053)
  • Subject: Q | Moniliophthora roreri | biocontrol. | Social sciences (General) | H1-99 | Science (General) | Trichoderma sp. | Q1-390 | Science | Bacillus sp.
    mesheuropmc: food and beverages

The Molinasis is caused fungus Moniliophthora roreri. Which is the most seriuos disease which attacks cocoa, and appears in almost anywhere across the country, causing significant losses to farmers. The recognition of the six kind of fungus Trichoderma sp. Obtained from: El Zulia, El Tarra, Bucarasica, Cúcuta and Agua Clara has been realized, along with the bacterial strain Bacillus sp. Isolationed of Bucarasica, which were evaluated, in order to determinate their antagonic potential in front of seven strains of Moniliophthora roreri fungus from El Zulia, Tibú, Teorama, Sardinata and Bucarasica. Tests have been realized: dual plate, diffusible metabolito and pre seeded (colonizated). An experimental design, completely randomly, has been used in all the tests. Each test has been repeated three times. During eight days of observation, were detected antagonistic (hostile) and hyperparasic reaction (a=0.05) by Trichoderma sp. In front of M. roreri, and only three of six strains of Trichoderma sp. have presented strong antagonistic reaction in front of M. roreri , not only micelial, but the metabolic; Bacillus sp has not presented any positive result during the tests. The antogonic fungus strains have been identified as Trichoderma asperellum y Trichoderma longibrachiatum. the bacterial strain has been identified as Bacillus brevis.
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