Chemical Composition and Insecticidal Activity of Aeollanthus pubescens Essential Oil Against Coffee Berry Borer (Hypothenemus hampei Ferrari) (Coleoptera: Scolytidae)

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Abstract
Essential oil extracted from aerial parts of Aeollanthus pubescens was analysed for its chemical composition and investigated for possible insecticidal activity against Hypothenemus hampei (Ferrari), the major pest of coffee throughout the world. The GC and GC-MS analyses indicated that linalool (56.4 %) and fenchone (28.6 %) were the main components of the tested A. pubescens oil sample. Emulsions of crude essential oil of A. pubescens exhibited adulticidal activity against coffee berry borer and response was being dose-related. The LD50 were respectively 220 ppm for A. pubescens essential oil and 450 ppm for endosulfan, the conventional insecticide used as standard. These preliminary findings indicate that the tested volatile oil have a potential insecticidal activity and can be used as active ingredient in natural and sustainable pesticide within an Integrated Pest Management approach to combat coffee berry borer.

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