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Larvicidal and Nematicidal Activities of the Leaf Essential Oil of Croton regelianus

✍ Scribed by Maria Conceição M. Torres; João Carlos Assunção; Gilvandete Maria P. Santiago; Manoel Andrade-Neto; Edilberto R. Silveira; Leticia V. Costa-Lotufo; Daniel P. Bezerra; José Delano B. Marinho Filho; Francisco Arnaldo Viana; Otília Deusdênia L. Pessoa

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
148 KB
Volume
5
Category
Article
ISSN
1612-1872

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✦ Synopsis

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.

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