Chemical composition and toxicity of the essential oils from Cunila species (Lamiaceae) on the cattle tick Rhipicephalus (Boophilus) microplus |
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| Authors: | Miriam A Apel Vera Lucia Sardá Ribeiro Sérgio A L Bordignon Amélia T Henriques and Gilsane von Poser |
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| Institution: | (1) Faculdade de Farmácia, UFRGS, Av. Ipiranga, 2752, 90610-000 Porto Alegre, RS, Brazil;(2) Laboratório de Entomologia, Faculdade de Veterinária, UFRGS, Av. Bento Gon?alves 9090, 91540-000 Porto Alegre, RS, Brazil;(3) Curso de Ciências Biológicas, Centro Universitário La Salle, Av. Victor Barreto, 2288, 92010-000 Canoas, RS, Brazil |
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| Abstract: | The essential oils obtained from the aerial parts of five species of Cunila (Lamiaceae) native to Southern Brazil were analyzed by GC and GC/MS. The oil of Cunila angustifolia was characterized by sabinene; Cunila incana is rich in α-pinene and β-pinene, Cunila spicata and Cunila microcephala presented menthofuran as the main component, and in the essential oil of Cunila incisa, the major component was 1,8-cineole. Laboratory tests were carried out to determine the effect of the essential oils of
the above cited plants on larvae of the cattle tick Riphicephalus (Boophilus) microplus. C. angustifolia, C. incana, and C. spicata were the most active samples killing almost the totality of the larvae. C. incisa and C. microcephala showed low acaricidal effect. |
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