Insecticidal activity of the leaf essential oil of Peperomia borbonensis MIQ.(Piperaceae) and its major components against the melon fly Bactrocera cucurbitae (Diptera: Tephritidae)

Dorla Emmanuelle, Gauvin-Bialecki Anne, Deuscher Zoé, Allibert Agathe, Grondin Isabelle, Deguine Jean-Philippe, Laurent Philippe. 2017. Insecticidal activity of the leaf essential oil of Peperomia borbonensis MIQ.(Piperaceae) and its major components against the melon fly Bactrocera cucurbitae (Diptera: Tephritidae). Chemistry and Biodiversity, 14 (6):e1600493, 9 p.

https://doi.org/10.1002/cbdv.201600493

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Quartile : Q3, Sujet : CHEMISTRY, MULTIDISCIPLINARY / Quartile : Q4, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Résumé : The essential oil from the leaves of Peperomia borbonensis from Réunion Island was obtained by hydrodistillation and characterized using GC-FID, GC/MS and NMR. The main components were myristicin (39.5%) and elemicin (26.6%). The essential oil (EO) of Peperomia borbonensis and its major compounds (myristicin and elemicin), pure or in a mixture, were evaluated for their insecticidal activity against Bactrocera cucurbitae (Diptera: Tephritidae) using a filter paper impregnated bioassay. The concentrations necessary to kill 50% (LC50) and 90% (LC90) of the flies in three hours were determined. The LC50 value was 0.23 ± 0.009 mg/cm2 and the LC90 value was 0.34 ± 0.015 mg/cm2 for the EO. The median lethal time (LT50) was determined to compare the toxicity of EO and the major constituents. The EO was the most potent insecticide (LT50 = 98 ± 2 min), followed by the mixture of myristicin and elemicin (1.4:1) (LT50 = 127 ± 2 min) indicating that the efficiency of the EO is potentiated by minor compounds and emphasizing one of the major assets of EOs against pure molecules.

Mots-clés Agrovoc : Peperomia, insecticide d'origine végétale, huile essentielle, propriété insecticide, composition chimique, composé aromatique, efficacité, Bactrocera cucurbitae, Cucumis melo, feuille, distillation