Control biológico del marchitamiento vascular causado por Fusarium oxysporum f. sp. phaseoli en fríjol Phaseolus vulgaris L., mediante la acción combinada de Entrophospora colombiana, Trichoderma sp. Y Pseudomonas fluorescens

Abstract

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mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--><span style="font-size: 10pt; line-height: 115%; font-family: ";Cambria";,";serif";;">Entrophospora colombiana, Trichoderma sp., Pseudomonas fluorescens y una combinación de estos antagonistas fueron evaluados como biocontroladores de Fusarium oxysporumf. sp. Phaseoli en plantas de fríjol de la variedad ‘ICA Tundama’. El ensayo se estableció en una casa de malla del Programa nacional de manejo integrado de plagas (MIP) de la Corporación Colombiana de Investigación Agropecuaria (Corpoica), en el Centro de Investigación Tibaitatá, Mosquera (Cundinamarca), utilizando un diseño completamente aleatorizado, con 5 tratamientos más un testigo absoluto y un testigo infectado. Las evaluaciones se realizaron durante la floración, el llenado de vainas y la cosecha. Los resultados fueron poco efectivos con los organismos utilizados y no parecen ser muy promisorios para el manejo de este tipo de enfermedades vasculares. Sin embargo, se encontraron valores destacables de colonización en las raíces de fríjol por parte de E. colombiana, pero sin mostrar un efecto vigorizante en el crecimiento de las plantas. La presencia de P. fluorescens aumentó el vigor de las plantas y dio como resultado un mayor crecimiento. La aplicación de Trichoderma sp. no presentó un poder antagónico aceptable, aunque fue el mejor resultado de control con respecto a los demás tratamientos</span>