
handle: 10495/28339
RESUMEN: Introducción: el aceite esencial extraído de especies del género Eucalyptus, entre estas Eucalyptus tereticornis, ofrece un importante potencial para el control de hongos patógenos e insectos plaga y de importancia médica. Objetivo: evaluar la actividad anti-insecto (aguda, crónica y repelente) de una emulsión aceite/agua del aceite esencial de Eucalyptus tereticornis, en función de su composición química y fraccionamiento. Métodos: se prepararon emulsiones aceite/agua con aceite esencial previamente extraído, separado y caracterizado, y 2 de sus fracciones (A y B). Se evaluó su actividad anti-insecto mediante bioensayos con Drosophila melanogaster. Se determinó la fitotoxicidad foliar sobre plántulas de Phaseolus vulgaris. Resultados: el aceite completo mostró considerable actividad repelente e insecticida aguda que guarda relación con su composición química. La actividad insecticida aguda de las fracciones disminuyó de manera notable con respecto a la mostrada por el aceite completo, sin embargo, no se observaron efectos significativos sobre la actividad repelente. En ningún caso se presentó fitotoxicidad foliar sobre frijol. Conclusión: el aceite esencial de esta especie de eucalipto posee actividad antiinsecto considerable y podría formularse directamente como insecticida para el control de insectos de interés agrícola y médico
ABSTRACT: Introduction: the essential oil extracted from Eucalyptus species, including Eucalyptus tereticornis, offers significant potential for control of fungal pathogens and insect pests and medical importance. Objectives: to evaluate the anti-insect activity (acute, chronic and repellent) of an oil/water emulsion of Eucalyptus tereticornis essential oil in terms of their chemical composition. Methods: oil/water emulsion was prepared with essential oil previously extracted, separated and characterized, and two of its fractions (A and B). Their anti-insect activity was evaluated through bioassays on Drosophila melanogaster. Foliar phytotoxicity was evaluated on seedlings of Phaseolus vulgaris. Results: the complete oil showed considerable acute repellent and insecticide activity related to its chemical composition. The acute insecticidal activity of the fractions decreased significantly if compare with that of the whole oil , but neither significant effects on the repellent activity nor phytotoxicity on the bean leaves were observed. Conclusions: the essential oil of this eucalyptus species has considerable antiinsect properties and could be formulated as an insecticide for the control of insectsof agricultural and medical significance
COL0007462
Insecticides, Emulsiones, Fitotoxicidad, http://aims.fao.org/aos/agrovoc/c_2669, Eucalyptus tereticornis, Insecticidas, 630, Essential oils, Phytotoxicity, Aceites esenciales, http://aims.fao.org/aos/agrovoc/c_26491, Emulsions
Insecticides, Emulsiones, Fitotoxicidad, http://aims.fao.org/aos/agrovoc/c_2669, Eucalyptus tereticornis, Insecticidas, 630, Essential oils, Phytotoxicity, Aceites esenciales, http://aims.fao.org/aos/agrovoc/c_26491, Emulsions
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