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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 10, No. 1, 2006, pp. 63-65
Bioline Code: ja06010
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 10, No. 1, 2006, pp. 63-65

 en Assessment of the Larvicidal potentials of Thymol derivatives on Anopheles mosquitoes
JACK, I R; OKOROSAYE-ORUBITE, K; BOBMANUEL, R B

Abstract

Thymol (1) a major constituent of the South Eastern Nigeria variety of ocimum gratissimum popularly known as nchawu (scent leaf) was converted to its O-methyl (2), O-ethyl (3), acetate (4) and the Benzyloxy (5) derivatives that are characterized by their spectral data such as infra red, proton n.m.r. and mass spectra. Tests on their insecticidal potency show that, like the parent compound thymol (1), they also possess insecticidal properties in decreasing order Benzyloxy > Acetate > O-ethyl > O-methyl. This order is explained partly by the electron withdrawing tendency of the benzyloxy and acetate groups and also that, as the molecular weight of the derivatives increases the solubility decreases.

 
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