Repellent and acaricidal activity of coconut oil fatty acids and their derivative compounds and catnip oil against Amblyomma sculptum.

Autor: Barrozo MM; Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Av. Esperança, s/n - Campus Samambaia, Goiânia, GO, 74690-900, Brazil., Zeringóta V; Programa de Pós-Graduação em Imunologia e Parasitologia Básicas e Aplicadas, Campus Araguaia, Unidade II, Avenida Valdon Varjão, nº 6390, Barra do Garças, MT, 78607-059, Brazil., Borges LMF; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Rua 235 s/n, Setor Universitário, Goiânia, GO, 74605050, Brazil. Electronic address: ligia@ufg.br., Moraes N; Programa de Pós-Graduação em Ciência Animal, Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, Av. Esperança, s/n - Campus Samambaia, Goiânia, GO, 74690-900, Brazil., Benz K; Onederings LLC, 2305 Clarksville Road, Clarksville, OH, 45113, USA., Farr A; Onederings LLC, 2305 Clarksville Road, Clarksville, OH, 45113, USA., Zhu JJ; USDA-ARS, AMRU, Lincoln, NE, 68583, USA. Electronic address: jerry.zhu@usda.gov.
Jazyk: angličtina
Zdroj: Veterinary parasitology [Vet Parasitol] 2021 Dec; Vol. 300, pp. 109591. Date of Electronic Publication: 2021 Oct 12.
DOI: 10.1016/j.vetpar.2021.109591
Abstrakt: This study was carried out aiming to evaluate the repellent and acaricidal activity of major ingredient compounds from coconut oil including their methyl ester derivatives and catnip oil against nymphs and larvae of Amblyomma sculptum. Repellent candidates, coconut oil free fatty acids (coconut FFA mainly C 12 , C 10 and C 8 acid); lauric acid (C 12 acid); capric acid (C 10 acid); methyl laurate; methyl caprate and 10 % each of C 12 , C 10 and C 8 acid (1:1:1) in lavender oil formulation (CFA in lavender formula) and catnip oil (Nepeta cataria), were screened using a Petri dish bioassay to assess repellency. Catnip oil, methyl caprate, methyl laurate, and CFA in lavender formulation repelled ticks strongly (P < 0.05) at almost all times evaluated, with an average of 77.8-100% repellency. Some candidate repellents with consistent strong repellence observed were selected for further evaluation, with coconut CFA in lavender formula showing a repellency lasted up to 7 days, while those of catnip oil and methyl caprate were active for 4 and 3 days, respectively. For the acaricide test, five concentrations (2.5; 5; 10; 15 and 20 mg/mL) were evaluated using the larval packet test. Only CFA in lavender formula and two methyl esters showed acaricidal activity, with methyl laurate presenting the strongest toxicity at 15 mg/mL concentration, which was effective against more than 93 % of the tested larvae. Catnip oil caused no mortality of A. scultptum larvae in all concentrations tested.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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