In vitro efficacy of essential oils with different concentrations of 1,8-cineole against Rhipicephalus (Boophilus) microplus

Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária
Karina Neoob de Carvalho CastroDhiéssica Morgana Alves Barros

Abstract

The aim of this study was to evaluate the acaricidal activity of essential oils from three species of plants with intermediary concentrations of 1,8-cineole against the tick species Rhipicephalus (Boophilus) microplus. For this purpose, five serial concentrations (100.0, 50.0, 25.0, 12.5, 6.2 mg/mL) of essential oils from Mesosphaerum suaveolens (L.) Kuntze, Ocimum gratissimum L. and Alpinia zerumbet (Pers.) B. L. Burtt & R. M. Sm. were used on larval packet and adult immersion tests. The essential oils were analysed by gas chromatography-mass spectrometry (GC/MS) and gas chromatography-flame ionization detection (GC-FID), being detected 35.8, 24.7 and 24.0% of 1.8-cineol in the oils of M. suaveolens, O. gratissimum and A. zerumbet, respectively. The lethal concentration (LC 50) of each oil for larvae and engorged females was calculated through Probit analysis. All essential oils showed high efficacy (≥ 95.0%) on engorged females at the 100.0 mg/mL concentration. In regards to larvae, O. gratissimum (LC 50 = 11.9 mg/mL) was the most potent, followed by the A. zerumbet (LC50 = 19.7 mg/mL) and the M. suaveolens (LC50 = 51.6 mg/mL) essential oils. These results show that other compounds interfere with 1,8-cineole action.

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Citations

Sep 17, 2020·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Rita de Cássia da Silva Machado NevesAna Maria Reis Ferreira
Apr 16, 2020·Experimental & Applied Acarology·Chuks F NwanadeJingze Liu
Mar 9, 2021·Veterinary Parasitology : Regional Studies and Reports·Rafaelle VinturelleEvelize Folly
Mar 26, 2020·Veterinary Parasitology·Alana Dos Santos CardosoAlexandra Martins Dos Santos Soares

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Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária
Karina Neoob de Carvalho CastroLívio Martins Costa-Junior
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