Table of Contents
Journal of Insects
Volume 2015 (2015), Article ID 319045, 6 pages
http://dx.doi.org/10.1155/2015/319045
Research Article

Chemical Composition and Insecticidal and Repellent Effect of Essential Oils of Two Premna Species against Sitotroga cerealella

1Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole Polytechnique d’Abomey-Calavi/Université d’Abomey-Calavi, 01 BP 2009 Cotonou, Benin
2Laboratoire de Production Végétale, Faculté des Sciences Agronomiques/Université d’Abomey-Calavi, 01 BP 526 Cotonou, Benin
3Laboratoire d’Analyse des Extraits Végétaux et des Arômes (LEXVA Analytique), 460 rue du Montant, 63110 Beaumont, Benin
4Institut des Biomolécules Max Mousseron, Equipe “Glyco et Nanovecteurs pour le Ciblage Thérapeutique”, Faculté de Pharmacie, 15 avenue Charles Flahault, BP 14491, 34093 Montpellier, France

Received 2 March 2015; Revised 26 June 2015; Accepted 8 July 2015

Academic Editor: Fedai Erler

Copyright © 2015 Elvis Adjalian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work aims to study for the first time the chemical composition and evaluate insecticidal and repellent effects of essential oils of Premna angolensis and Premna quadrifolia leaves, against Sitotroga cerealella, an insect pest of rice stocks as alternatives to synthetic pesticides. The GC-MS analysis showed that essential oil of P. angolensis contains 29 compounds representing 96.1% of the oil and 42 compounds corresponding to 91% for the essential oil of P. quadrifolia. The main constituents regardless of the species were β-caryophyllene (13.1%), (E)-β-caryophyllene (13.5%), octen-3-ol (3.2%–28%), phytol (3.7%–4.9%), β-elemene (1.4%–21%), globulol (11.2%), germacrene-D (8.9%), α-humulene (2.9%–6.4%), α-pinene (5%), sabinene (3.7%), δ-cadinene (0.4%–3.3%), and linalool (3.3%). The results of laboratory tests showed that both essential oils have insecticidal and repellent effects on S. cerealella. Presenting the results, the damage caused by the adults and larvae of S. cerealella was evaluated by calculating the percentage of grains attacked and weight loss thereof. The results suggest that volatile extracts of P. angolensis and P. quadrifolia can be used as alternatives to synthetic chemicals in paddy protection against S. cerealella.