Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/23569
Tipo: Artigo
Título: Activity of essential oil of Lippia triplinervis Gardner (Verbenaceae) on Rhipicephalus microplus (Acari: Ixodidae)
Autor(es): Lage, Tiago Coelho de Assis
Montanari, Ricardo Marques
Fernandes, Sergio Antonio
Monteiro, Caio Márcio de Oliveira
Senra, Tatiane de Oliveira Souza
Zeringota, Viviane
Calmon, Fernanda
Matos, Renata da Silva
Daemon, Erik
Abstract: The objective of this work was to characterize and investigate the acaricidal activity of the essential oil of the aerial parts of Lippia triplinervis at different concentrations on unengorged larvae and engorged females of Rhipicephalus microplus. The essential oil yielded 2.21 % (w/w to dry matter) and was composed mainly of carvacrol (31.9 %), thymol (30.6 %), and p-cymene (12.3 %). Two tests were performed to assess the acaricidal activity: the modified larval packet test, with concentrations of 2.5, 5.0, 10.0, 15.0, and 20.0 mg/mL and the female immersion test, with concentrations of 10.0, 20.0, 30.0, 40.0, and 50.0 mg/mL. There were ten repetitions for each concentration, and for each test, a control group was formed in which the ticks were treated with Tween 80 (20 mg/mL). The experimental groups were kept in a climate-controlled chamber (27 ± 1 °C and RH >80 %). The mortality of the larvae was above 95 % in all the groups tested and reached 100 % as of the 5.0 mg/mL concentration, while the control group exhibited 0 % mortality. In the female immersion test, there was a significant decline (p < 0.05) in the egg mass weight, egg production index, and hatching percentage starting at the concentration of 30.0, 40.0, and 20.0 mg/mL, respectively, and the control percentage at the concentrations of 40.0 and 50.0 mg/mL were above 90 and 95 %. The L. triplinervis oil as thus an alternative source of the monoterpenes thymol, carvacrol, and p-cymene, and its toxicity on R. microplus larvae and females makes it promising possibility for control of this tick.
Palavras-chave: Thymol
Carvacrol
Amitraz
Macrocyclic Lactone
Engorge female
Editor: Parasitology Research
Tipo de Acesso: Springer-Verlag Berlin Heidelberg 2012
URI: https://doi.org/10.1007/s00436-012-3209-y
http://www.locus.ufv.br/handle/123456789/23569
Data do documento: Fev-2013
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