Original Research Article | OPEN ACCESS

Pharmacognostic standardization and insecticidal activity of the leaves of Tecoma stans Juss (Bignoniaceae)

Tavs A Abere , Comfort O Enoghama

Department of Pharmacognosy, Faculty of Pharmacy, University of Benin, Benin City. PMB 1154, Nigeria;

For correspondence:-  Tavs Abere   Email:  eseabere@yahoo.com   Tel:  +2348023395616

Published: 31 December 2015

Citation: Abere TA, Enoghama CO. Pharmacognostic standardization and insecticidal activity of the leaves of Tecoma stans Juss (Bignoniaceae). J Sci Pract Pharm 2015; 2(1):39-45 doi: 10.47227/jsppharm.v2i1.9

© 2015 The author(s).
This is an Open Access article that uses a funding model which does not charge readers or their institutions for access and distributed under the terms of the Creative Commons Attribution License (CC BY-NC 4.0 - http://creativecommons.org/licenses/by/4.0) and the Budapest Open Access Initiative (http://www.budapestopenaccessinitiative.org/read), which permit unrestricted use, distribution, and reproduction (non-commercially) in any medium, provided the original work is properly credited..

Abstract

Purpose: Many medicinal plants have been said to be protective against insect damage without any scientific proof that they possess insecticidal activity. This study was aimed at establishing the Pharmacognostic profile and insecticidal activity of the leaves of Tecoma stans Juss (Bignoniaceae) to confirm its traditional application and justify continuous usage.
Methods:Evaluation of the fresh, powdered and anatomical sections of the leaves were carried out to determine the macromorphological, micromorpho-logical, chemomicroscopic, numerical and phytochemical profile. Evaluation of the insecticidal activity involved the determination of antifeedant properties, repellant and insecticidal actions of the extract and its fractions.
Results:Macro and microscopic studies gave results that could serve as a basis for proper identification, collection and investigation of the leaves of T. stans. Phytochemical screening revealed the presence of alkaloids, tannins, flavonoids, cardiac glycosides and saponins. The crude extract and fractions produced antifeedant, repellant and insecticidal activities to varying degrees.
Conclusion:Pharmacognostic parameters of T. stans that can aid its standardization and quality control has been provided. T. stans has the potential to act as a lead in the commercial production of insecticides of plant origin.

Keywords: Quality control, antifeedant properties, repellant action

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