title: Larvicidal and nematicidal activities of the leaf essential oil of Croton regelianus.
abstract: The chemical composition of the leaf essential oil of Croton regelianus collected from wild plants growing in two different sites at Ceará State (Brazil) was analyzed by GC/MS and GC-FID. Twenty monoterpenoids, representing more than 96% of the chemical composition of the oils, were identified and quantified. The oils showed similar chemical composition but considerable variation in the levels of each constituent. Ascaridole (33.9-17.0%), p-cymene (22.3-21.6%), and camphor (13.0-3.1%) were the predominant constituents. The monoterpene ascaridole was isolated and characterized by spectroscopic data. The essential oils and the isolated compounds were tested against Aedes aegypti and Artemia sp. larvae, and the root knot nematode Meloidogyne incognita. The bioassay results show that the essential oil of C. regelianus and ascaridole were moderately active against the M. incognita, but strongly effective against both A. aegypti and Artemia sp. larvae.
authors.affiliation: Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Fortaleza-CE, Brazil.
authors.forename: Maria Conceição M
authors.initials: MC
authors.lastname: Torres
authors.forename: João Carlos
authors.initials: JC
authors.lastname: Assunção
authors.forename: Gilvandete Maria P
authors.initials: GM
authors.lastname: Santiago
authors.forename: Manoel
authors.initials: M
authors.lastname: Andrade-Neto
authors.forename: Edilberto R
authors.initials: ER
authors.lastname: Silveira
authors.forename: Leticia V
authors.initials: LV
authors.lastname: Costa-Lotufo
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Bezerra
authors.forename: José Delano B
authors.initials: JD
authors.lastname: Marinho Filho
authors.forename: Francisco Arnaldo
authors.initials: FA
authors.lastname: Viana
authors.forename: Otília Deusdênia L
authors.initials: OD
authors.lastname: Pessoa
mesh_terms: D000330:Aedes / Q000187:drug effects*; D000818:Animals; D000969:Antinematodal Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D002849:Chromatography, Gas; D029802:Croton / Q000737:chemistry*; D003436:Croton Oil / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D000081005:Cyclohexane Monoterpenes; D007306:Insecticides / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D007814:Larva / Q000187:drug effects; D007928:Lethal Dose 50; D039821:Monoterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D009348:Nematoda / Q000187:drug effects; D010545:Peroxides / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D000969:Antinematodal Agents; D000081005:Cyclohexane Monoterpenes; D007306:Insecticides; D039821:Monoterpenes; D010545:Peroxides; C043372:ascaridole; D003436:Croton Oil