Insecticidal and repellent effects of essential oils from leaves of Hyptis suaveolens and Ocimum canum against Tenebroides mauritanicus (L.) isolated from peanut in post-harvest

  • Euloge S. AdjouEmail author
  • Daniel Chougourou
  • Mohamed M. Soumanou
Research Article


The present work aims to evaluate the insecticidal and repellent effects of essential oils from fresh leaves of Hyptis suaveolens and Ocimum canum against Tenebroides mauritanicus (L.) (Coleoptera: Tenebrionidaea) isolated from peanut in post-harvest in Benin. Chemical analysis of essential oils by GC and GC-MS indicated that, in the volatile extracts, different groups of terpene and terpenoid were present. The results of contact toxicity tests indicated that at a concentration of 0.5 µl of essential oil/g of peanut the mortality rate of Tenebroides mauritanicus (L.) is 100% after 24 h for the essential oil of Hyptis suaveolens, while it is still at 20% for the essential oil of Ocimum canum. Results also indicated that Hyptis suaveolens oil has a high repellent activity, when compared to the essential oil of Ocimum canum. This essential oil with high repellent and insecticidal properties represents a novel approach in the protection of grains against T. mauritanicus and the reduction of post-harvest losses.


Peanut T. mauritanicus (L.) Essential oils Insecticidal Repellency Benin 



The authors are grateful to the Department of Food Engineering of Polytechnic School of Abomey-Calavi University for the financial support.

Compliance with ethical standards

Conflict of interest

The authors declare that there are no conflicts of interest.


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Copyright information

© Bundesamt für Verbraucherschutz und Lebensmittelsicherheit (BVL) 2018

Authors and Affiliations

  • Euloge S. Adjou
    • 1
    Email author
  • Daniel Chougourou
    • 1
  • Mohamed M. Soumanou
    • 1
  1. 1.Laboratory of Research and Study in Applied Chemistry, Polytechnic School of Abomey-CalaviUniversity of Abomey-CalaviCotonouBenin

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