The Journal of Phytopharmacology, 2020;9(2):125-129 ;   DOI:10.31254/phyto.2020.9209

Research Article

Bioactivity of essentials oils of Hyptis suaveolens (L.) on the reproductive parameters of the Rhipicephalus (Boophilus) microplus

Soumanou Salifou¹ , Houénagnon Marcel Aristide Houngnimassoun¹ , Ignace Ogoudananan Dotche¹ , Sabbas Attindehou^1,2 , Sahidou Salifou¹

Soumanou Salifou,Houénagnon Marcel Aristide Houngnimassoun,Ignace Ogoudananan Dotche,Sabbas Attindehou,Sahidou Salifou

1. Laboratoire de Recherche en Biologie Appliquée, Université d'Abomey-Calavi, 01 BP 2009 Cotonou, Benin
2. Ecole de Gestion et Exploitation des Systèmes d'Elevage - Université d'Agriculture, BP 43 Kétou-Benin

*Author to whom correspondence should be addressed.

Received: 1st February, 2020 / Accepted: 10th March, 2020

Abstract

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The chemical composition of three essential oils of Hyptis suaveolens was performed by gas chromatography coupled with mass spectrometry and their bioactivity was deduced from a multi-dose immersion test in increasing progression.

The results show that the essential oils of H. suaveolens analysed are of two types: a sesquiterpenedominant type (51.86%) very rich in ?-caryophyllene (20.69%) and a monoterpene-dominant type (38.08%) which is distinguished from the first by a relatively high eucalyptol (1.8-Cineole) content (12.11%). Laboratory tests indicate a high toxicity of the ?-caryophyllene chemotype on females of R. (B.) microplus. Only gorged females exposed to the two concentrations (1% and 2%) of this oil laid eggs with a laying delay of 168 hours. The egg laying inhibition rate recorded for these two concentrations is 65 and 98% respectively. The essential oil of H. suaveolens therefore represents a very interesting alternative to the use of synthetic antiparasitic.

Keywords

Essential oil, Hyptis Suaveolens, ?-caryophyllene, R. (B.) microplus, oviposition.

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