Authors : T.S.L. Ngamo , W.F. Noudjou , M.B. Ngassoum , P.M. Mapongmestsem , A.B. Aminatou Boubakary , F. Malaisse , E. Haubruge , G. Lognay and T. Hance
Abstract: Leaves of Vepris heterophylla (Rutaceae) are used traditionally as medicine and in crop protection for the reduction of post harvest losses due to insect pests. The present research aims to investigate the chemical composition, the toxicity and the repellent activities of the essential oil leaves of V. heterophylla collected in 2 localities (Mokolo and Meri). The research pointed out that, the 2 essential oils differ in their chemical composition. Sabinene and E- -ocimene are the most common important compounds. Sabinene is particular to the essential oil from Meri (19.1%). E-caryophyllene, -humulene, elemol and germacrene, are the comon lowest compounds. E-carryophyllene (3.1%) and safrole (3%) are active compounds more present in the essential oil from Mokolo. Evaluation of the insecticidal properties of these 2 oils pointed out that the volume of essential oil killing half of the insect population tested (VL50) is not the same for the 2 oils. That from Mokolo is 49.44 �L from Meri is the highest, 61.2 �L. This useful plant is also cited as endangered, it is therefore an emergency to search strategy of exploitation that preserves this important component the local biodiversity.
T.S.L. Ngamo , W.F. Noudjou , M.B. Ngassoum , P.M. Mapongmestsem , A.B. Aminatou Boubakary , F. Malaisse , E. Haubruge , G. Lognay and T. Hance , 2007. Investigations on Both Chemical Composition and Insecticidal Activities of Essential Oils of Vepris heterophylla (Rutaceae) from Two Localities of Northern Cameroon Towards Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) . Research Journal of Biological Sciences, 2: 57-61.