| Literature DB >> 17653457 |
Heloísa Helena Garcia da Silva1, Regina Geris, Edson Rodrigues Filho, Cleonice Rocha, Ionizete Garcia da Silva.
Abstract
Oil-resin fractions from Copaifera reticulata Ducke (Leguminosae-Caesalpinoideae) were evaluated for larvicidal activity on third larval instars of Aedes aegypti, in searching for alternative control methods for this mosquito. The bioactive fractions were chemically monitored by thin-layer chromatography, (1)H and 13C nuclear magnetic resonance and mass spectrometry. Bioassays were performed using five repetitions, at a temperature of 28+/-1 degrees C, relative humidity of 80+/- 5% and light and dark cycles of 12h. Mortality was indicated by darkening of the cephalic capsule after 24h of exposure of the larvae to the solutions. The most active fractions were CRM1-4 (sesquiterpenes) and CRM5-7 (labdane diterpenes), which showed LC50 values of 0.2 and 0.8 ppm, respectively.Entities:
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Year: 2007 PMID： 17653457 DOI： 10.1590/s0037-86822007000300002
Source DB: PubMed Journal: Rev Soc Bras Med Trop ISSN： 0037-8682 Impact factor: 1.581