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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 71, No. 2, 2011, pp. 212-217
Bioline Code: cj11025
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 71, No. 2, 2011, pp. 212-217

 en Chemical Constituents and Toxicity of Agastache foeniculum check for this species in other resources (Pursh) Kuntze Essential Oil Against Two Stored-Product Insect Pests
Ebadollahi, Asgar

Abstract

The uncontrolled use of synthetic insecticides is a great hazard for the environment and consumers. Essential oils were introduced as low toxic agents against mammals and non-targeted insects. In this study, essential oil from aerial parts of blue giant hyssop ( Agastache foeniculum check for this species in other resources [Pursh] Kuntze) (Lamiaceae) was isolated by the water steam distillation method with a Clevenger apparatus, and its chemical composition was studied by gas chromatography mass spectrometry. The toxicity of A. foeniculum essential oil against red flour beetle, Tribolium castaneum check for this species in other resources (Herbst),and lesser grain borer Rhyzopertha dominica check for this species in other resources (F.) was evaluated by fumigation at 24, 48, and 72 h exposure times. Estragole and 1,8-cineole were identified as major constituents of the A. foeniculum oil. Fumigation bioassays revealed that A. foeniculum oil had strong insecticidal activity on experimental insects. Rhyzopertha dominica was more susceptible than T. castaneum for all exposure times. Insecticidal activity varied with essential oil concentration and exposure time. Probit analysis showed that increased exposure time and essential oil concentration increased mortality. These results indicated that A. foeniculum essential oil can be applied in the management of stored-product insects to decrease the detrimental effects of synthetic insecticides.

Keywords
Blue giant hyssop, fumigation, Rhyzopertha dominica, Tribolium castaneum

 
 es Componentes químicos y toxicidad del aceite esencial de Agastache foeniculum check for this species in other resources (Pursh) Kuntze contra dosplagas de insectos de productos almacenados.
Ebadollahi, Asgar

Resumen

El uso incontrolado de los insecticidas sintéticos causa gran peligro para el medio ambiente y los consumidores. Los aceites esenciales se presentan como agentes tóxicos leves contra mamíferos e insectos no objetivo. En el presente estudio, el aceite esencial de las partes aéreas del hisopo gigante azul ( Agastache foeniculum check for this species in other resources [Pursh] Kuntze) (Lamiaceae) se aisló por el método de destilación al vapor de agua, utilizando un aparato de Clevenger y se estudió su composición química mediante cromatografía de gases y espectrometría de masas. La toxicidad del aceite esencial de A. foeniculum se evaluó por métodos de fumigación a las 24, 48 y 72 h contra el escarabajo rojo de la harina ( Tribolium castaneum check for this species in other resources (Herbst)) y el barrenador menor de granos ( Rhyzopertha dominica check for this species in other resources (F.)). El estragol y 1,8-cineole se detectaron como componentes principales en el aceite A. foeniculum. Los bioensayos revelaron que el aceite de A. foeniculum tuvo una fuerte actividad insecticida sobre los insectos experimentales. R. dominica fue más susceptible que T. castaneum en todos los tiempos. La actividad insecticida varió con las concentraciones de aceite esencial y los tiempos de exposición. El análisis Probit mostró que la mortalidadaumenta con el incremento del tiempo de exposición y la concentración del aceite esencial. Estos resultados indican que el aceite esencial del A. foeniculum podría ser aplicable al manejo de insectos de productos almacenados con el fin de disminuir los efectos perjudiciales de la utilización de insecticidas sintéticos.

Palabras-clave
hisopo gigante azul, fumigación, Rhyzopertha dominica, Tribolium castaneum

 
© Copyright 2010 Chilean Journal of Agricultural Research.
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