Abstract
The aim of this research was to determine the chemical composition and toxicities of essential oil derived from Illicium fargesii Finet et Gagnep fruits against the maize weevil ( Sitophilus zeamais Motsch). Essential oil of I. fargesii fruits was obtained from hydrodistillation and was investigated by GC (Gas Chromatography) and GC–Mass Spectrometry (GC-MS). A total of 43 components of the essential oil of I. fargesii fruits were identified. The principal compounds in I. fargesii essential oil were α-terpineol (11.4%), carvone (10.9%), d-limonene (9.8%), trans-carveol (6.6%) and trans-pinocarveol (5.5%). The essential oil of I. fargesii possessed strong fumigant toxicity against the maize weevil with an LC 50 value of 11.36 mg/L air. The essential oil of I. fargesii also exhibited contact toxicity against S. zeamais adults with an LD 50 value of 28.95 μg/adult. The result indicate that the essential oil of I. fargesii show potential in terms of fumigant and contact toxicities against grain storage insects. Key words : Illicium fargesii, Sitophilus zeamais, fumigant, contact toxicity, essential oil composition.
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