Research Article

Studies on essential oils, Part 33: chemical and insecticidal investigations on leaf oil of Coleus amboinicus Lour.

  1. Gurdip Singh1,*,
  2. Om Prakash Singh1,
  3. Y. R. Prasad2,
  4. M. P. de Lampasona3,
  5. C. Catalan3

Article first published online: 7 JUN 2002

DOI: 10.1002/ffj.1123

Issue

Flavour and Fragrance Journal

Flavour and Fragrance Journal

Volume 17, Issue 6, pages 440–442, November/December 2002

Additional Information

How to Cite

Singh, G., Singh, O. P., Prasad, Y. R., de Lampasona, M. P. and Catalan, C. (2002), Studies on essential oils, Part 33: chemical and insecticidal investigations on leaf oil of Coleus amboinicus Lour. Flavour Fragr. J., 17: 440–442. doi: 10.1002/ffj.1123

Author Information

  1. 1

    Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur-273009, UP, India

  2. 2

    Government P.G. College, Rajahmundry, India

  3. 3

    Instituto de Quimica, Organica Universidad Nacional de Tucuman, Ayacucho 471, S.M.de Tucuman 4000, Argentina

*Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur-273009, UP, India.

Publication History

  1. Issue published online: 7 JUN 2002
  2. Article first published online: 7 JUN 2002
  3. Manuscript Accepted: 12 FEB 2002
  4. Manuscript Revised: 11 FEB 2002
  5. Manuscript Received: 24 JUN 2001

Funded by

  • Ministry of Science and Technology, India.

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Keywords:

  • Coleus amboinicus;
  • chemical composition;
  • insecticides;
  • Odontotermes obesus;
  • essential oil

Abstract

Chemical investigations of the leaf essential oil of Coleus amboinicus by GC and GC–MS techniques indicated the presence of six components, accounting for 97% of the total oil. The major component was thymol (94.3%), followed by carvacrol (1.2%), 1,8-cineole (0.8%), p-cymene (0.3%), spathulenol (0.2%), terpinen-4-ol (0.2%) and an unidentified component (1.4%). The oil was insecticidal to white termites (Odontotermes obesus Rhamb.) with 100% mortality at a dose of 2.5 × 10−2 mg/cm3 for 5 h exposure. This oil was also more active than the synthetic insecticides, Thiodan and Primoban-20, against termites, although it was ineffective against Tribolium castaneum, a stored product pest. Copyright © 2002 John Wiley & Sons, Ltd.

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