Cymbopogoncitratus, Cymbopogongiganteus and Cymbopogonnardus leaves were
collected in September 2006 from Porto-Novo, Setto and Tori-Cada towns in southern of
Benin respectively, while Cymbopogon Schoenanthus leaves were sampled from Boukoumbé
town in northern of Benin in November 2006. All plants were identified at Abomey-Calavi
University National Herbarium and voucher specimen numbers: AA6456/HNB,
AA6457/HNB, AA6458/HNB and AA6459/HNB respectively, were deposited.
Extraction of the essential oils: The leaves were air-dried at room temperature (17-20°C) and
were distilled for 3h using a Clevenger type apparatus. The essentials oils collected at the end
of this process were dried with anhydrous sodium sulphate prior to their use in the analysis of
volatile compounds.