Efecto de las precipitaciones en la susceptibilidad de clones de Eucalyptus grandis x Eucalyptus urophylla al cancro del eucalipto causado por Chrysoporthe cubensis.
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Date
2023
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Universidad de Concepción
Abstract
El creciente interés por plantaciones de Eucalyptus spp. en Colombia se enfrenta al desafío de controlar la enfermedad del cancro causada por Chrysoporthe cubensis, este hongo que ataca el cambium de los árboles puede ocasionar la muerte o quiebre del fuste afectando la productividad de las plantaciones en regiones tropicales. Su gestión se centra en el uso y selección de híbridos y clones resistentes. En este estudio se examinó el rol de las precipitaciones en la respuesta de híbridos de Eucalypus grandis x E. urophylla a la enfermedad del cancro en condiciones de campo en Córdoba, Colombia. Para ello, se establecieron ensayos en localidades con niveles de precipitación contrastante. Árboles de 24 genotipos de distinto origen fueron inoculados con una cepa agresiva de C. cubensis y luego de 9 meses se fotografiaron y midieron los cancros y sus lesiones internas asociadas. Se encontró una interacción significativa de ClonxSitio, siendo el sitio con menor rango de precipitaciones el que presentó una mayor mortalidad y longitud de lesiones formadas, así como una correlación significativa entre la severidad externa e interna de las lesiones producidas por la inoculación.
The growing interest in plantations of Eucalyptus spp. Colombia faces the challenge of controlling the canker disease caused by Chrysoporthe cubensis, this fungus that attacks the cambium of trees can cause the death or breakage of the stem, affecting the productivity of plantations in tropical regions. Its management focuses on the use and selection of resistant hybrids and clones. In this study, the role of precipitation in the response of Eucalypus grandis x E. urophylla hybrids to canker disease was examined under field conditions in Córdoba, Colombia. To this end, trials were established in locations with contrasting precipitation levels. Trees of 24 genotypes of different origin were inoculated with an aggressive strain of C. cubensis and after 9 months the cankers and their associated internal lesions were photographed and measured. A significant ClonxSite interaction was found, with the site with the lowest rainfall range having the highest mortality and length of lesions formed, as well as a significant correlation between the external and internal severity of the lesions produced by inoculation.
The growing interest in plantations of Eucalyptus spp. Colombia faces the challenge of controlling the canker disease caused by Chrysoporthe cubensis, this fungus that attacks the cambium of trees can cause the death or breakage of the stem, affecting the productivity of plantations in tropical regions. Its management focuses on the use and selection of resistant hybrids and clones. In this study, the role of precipitation in the response of Eucalypus grandis x E. urophylla hybrids to canker disease was examined under field conditions in Córdoba, Colombia. To this end, trials were established in locations with contrasting precipitation levels. Trees of 24 genotypes of different origin were inoculated with an aggressive strain of C. cubensis and after 9 months the cankers and their associated internal lesions were photographed and measured. A significant ClonxSite interaction was found, with the site with the lowest rainfall range having the highest mortality and length of lesions formed, as well as a significant correlation between the external and internal severity of the lesions produced by inoculation.
Description
Tesis presentada para optar al grado de Magíster en Ciencias Forestales