Insecticidal and repellent action of pogostone against Myzus persicae (Homoptera: Aphididae)
Keywords:
antifeedant, toxicity, honeydew productionAbstract
Essential oil of Pogostemon cablin (Blanco) Benth. has been reported to show strong insecticidal activities, but few studies have focused on the insecticidal activity of its main individual constituent. Pogostone (PO) is an important natural product isolated from Pogostemon cablin (Blanco) Benth. The present work was designed to evaluate the insecticidal and repellent activity of pogostone against Myzus persicae (Homoptera: Aphididae). In a dual choice test, Pogostone exhibited strong repellent activity against M. persicae (repellent index was over 0.45 for PO at a concentration of 1000 mg L-1). Pogostone showed pronounced contact toxicity (LC50 1694 mg L-1) against this piercing-sucking insect. Moreover, PO showed powerful antifeedant activity against M. persicae. PO possesses strong insecticidal and repellent activity against M. persicae. Pogostone may partly account for the insecticidal activity of patchouli oil. This study demonstrated the potential of pogostone as a promising candidate for managing agricultural insects.
Key Words: antifeedant; toxicity; honeydew production
Resumen
El aceite esencial de Pogostemon cablin (Blanco) Benth. (Lamiaceae), conocido como el aceite de pachuli, ha demostrado tener fuertes actividades insecticidas, pero pocos estudios se han enfocado en la actividad insecticida de su componente principal, pogostona. El presente trabajo fue diseñado para evaluar las actividades insecticidas, repelentes y de anti-alimentión de pogostona contra Myzus persicae (Sulzer) (Hemiptera: Aphididae). En una prueba de elección, pogostona tuvo una actividad repelente fuerte contra M. persicae. Pogostona también mostró una toxicidad de contacto pronunciada (CL50 de 1.694 mg/L) a este insecto picador-chupador, así como una poderosa actividad de anti- alimentación. Pogostona puede explicar en parte la actividad insecticida del aceite de pachulí, pero también tiene otras propiedades valiosas. Este estudio demostró el potencial de la pogostona como un candidato prometedor para el manejo de insectos de importancia agrícolas.
Palabras Clave: anti-alimentación; toxicidad; producción de mielcilla
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