Mosquito larvicidal activity of active constituent derived from Chamaecyparis obtusa leaves against 3 mosquito species.

Autor(es): Jang Young-Su; Jeon Ju-Hyun; Lee Hoi-Seon

Resumo: Mosqutio larvicidal activity of Chamaecyparis obtusa leaf-derived materials against the 4th-stage larvae of Aedes aegypti (L.), Ochlerotatus togoi (Theobald), and Culex pipiens pallens (Coquillett) was examined in the laboratory. A crude methanol extract of C. obtusa leaves was found to be active (percent mortality rough) against the 3 species larvae; the hexane fraction of the methanol extract showed a strong larvicidal activity (100% mortality) at 100 ppm. The bioactive component in the C. obtusa leaf extract was characterized as beta-thujaplicin by spectroscopic analyses. The LC50 value of beta-thujaplicin was 2.91, 2.60, and 1.33 ppm against Ae. aegypti, Oc. togoi, and Cx. pipiens pallens larvae. This naturally occurring C. obtusa leaves-derived compound merits further study as a potential mosquito larval control agent or lead compound.

Palavras-Chave: Mosquito larvicide; Chamaecyparis obtusa; ?-thujaplicin; Aedes aegypti; Ochlerotatus togoi; Culex pipiens pallens

Imprenta: Journal of the American Mosquito Control Association, v. 21, n. 4, p. 400-403, 2005

Identificador do objeto digital: 10.2987/8756-971X(2006)21[400:MLAOAC]2.0.CO;2

Descritores: Aedes aegypti - Public health

Data de publicação: 2005