title: Acaricidal activity and chemical composition of the essential oil from three Piper species.
abstract: The chemical composition of the essential oil obtained by hydrodistillation of the aerial parts of Piper amalago, Piper mikanianum, and Piper xylosteoides was elucidated by gas chromatography (GC) and GC/mass spectrometry analyses. P. mikanianum and P. xylosteoides essential oils presented phenylpropanoids as their main compounds (67.89% and 48.53%, respectively) whereas P. amalago was rich in monoterpene and sesquiterpene hydrocarbons (84.95%). The essential oils obtained were investigated for their effect on newly hatched larvae of the cattle tick, Rhipicephalus (Boophilus) microplus. The essential oil of P. mikanianum (LC(50) 2.33 microL/mL) was more active than that of P. xylosteoides (LC(50) 6.15 microL/mL) against the larvae, while the oil of P. amalago was inactive. These results suggest that phenylpropanoids, mainly apiol and safrole, are responsible for the acaricidal activity.
authors.affiliation: Programa de Pós-Graduação em Genética e Toxicologia, Universidade Luterana do Brasil, Aplicada, Av. Farroupilha, 8001 Bairro São José, Canoas, Rio Grande do Sul, Brazil. alexandre.ferraz@ulbra.br
authors.forename: Alexandre
authors.initials: A
authors.lastname: de B F Ferraz
authors.forename: João Marcio
authors.initials: JM
authors.lastname: Balbino
authors.forename: Claudia Alcaraz
authors.initials: CA
authors.lastname: Zini
authors.forename: Vera Lucia S
authors.initials: VL
authors.lastname: Ribeiro
authors.forename: Sérgio A L
authors.initials: SA
authors.lastname: Bordignon
authors.forename: Gilsane
authors.initials: G
authors.lastname: von Poser
mesh_terms: D056810:Acaricides / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D000818:Animals; D002417:Cattle; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D007814:Larva / Q000187:drug effects; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D031701:Piper / Q000737:chemistry*; D048494:Rhipicephalus / Q000187:drug effects*; D016019:Survival Analysis
chemical_list: D056810:Acaricides; D009822:Oils, Volatile