Estudio preliminar sobre la relación entre la fertilización mineral y la incidencia de Dioryctria horneana (Lepidóptera: Phycitidae) en Pinus caribaea
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Abstract
Se evaluó la relación entre el fraccionamiento de diferentes dosis de fertilizante mineral fórmula completa 8-10-10 (NPK) sobre plantaciones de Pinus caribaea var. caribaea de 14 años de edad establecidas en un suelo Ferralítico Cuarcítico Amarillo, y la intensidad de los daños de la plaga Dioryctria horneana. Los índices más elevados de los daños se encontraron en las parcelas de los tratamientos testigos, de aquellos con fertilización continua y con una sola aplicación. Los índices más pequeños de ataques se registraron en plantaciones con tratamientos de fertilización en años alternos en los primeros cinco años de vida. Las concentraciones mayores de nitrógeno en el follaje y los menores en el floema coinciden con una mayor incidencia de la plaga, pero ocurre lo inverso con las concentraciones de fósforo y potasio en el follaje.
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