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Tropical Journal of Pharmaceutical Research
Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, Nigeria
ISSN: 1596-5996
EISSN: 1596-9827
Vol. 13, No. 9, 2014, pp. 1515-1520
Bioline Code: pr14208
Full paper language: English
Document type: Research Article
Document available free of charge

Tropical Journal of Pharmaceutical Research, Vol. 13, No. 9, 2014, pp. 1515-1520

 en Gas Chromatography-Mass Spectrometric Analysis and Insecticidal Activity of Essential Oil of Aerial Parts of Mallotus apelta check for this species in other resources (Lour.) Muell.-Arg. (Euphorbiaceae)
Liu, Xin Chao; Chen, Xu Bo & Liu, Zhi Long

Abstract

Purpose: To investigate the chemical composition and insecticidal activity of the essential oil of the aerial parts of Mallotus apelta check for this species in other resources against maize weevils, Sitophilus zeamais and booklice, Liposcelis bostrychophila check for this species in other resources .
Methods: Water-distilled essential oil of M. apelta aerial parts was analyzed by gas chromatography/mass spectrometric (GC/MS) to determine its composition. Insecticidal activities of the essential oil were measured by using topical application/ impregnated filter paper and seal-spaced fumigation.
Results: Thirty-six compounds, accounting for 97.75 % of the oil, were identified. The main compounds found were β-eudesmol (18.65 %), β-caryophyllene (9.83%), β-selinene (6.55 %), caryophyllene oxide (6.29 %), bornyl acetate (6.07%), γ-eudesmol (5.40 %) and α-selinene (5.06 %). The essential oil showed contact toxicity against adult maize weevils L. bostrychophila with LD50 (lethal dosage, 50 %) value of 46.69 μg/adult and 211.02 μg/cm, respectively. The essential oil also exhibited fumigant toxicity against adult S. zeamais and L. bostrychophila with a LC50 (median lethal concentration) value of 48.42 and 3.21 mg/l, respectively.
Conclusion: The study indicates that the essential oil of M. apelta has the potential to be developed into a natural fumigant/insecticide for the control of stored product insects.

Keywords
Mallotus apelta; Sitophilus zeamais; Liposcelis bostrychophila; Contact toxicity; Fumigant; Essential oil

 
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