A study on the insecticidal property of the leaves of flame tree (Caesalpinia Pulcherrima (L.) Sw.)
Date of Publication
1984
Document Type
Master's Thesis
Degree Name
Master of Science in Teaching Major in Chemistry
Subject Categories
Chemistry
College
Br. Andrew Gonzalez FSC College of Education
Department/Unit
Science Education
Thesis Adviser
Luzvisminda Rivero
Defense Panel Chair
Wyona Patalinghug
Defense Panel Member
Cecilia Flores
Consolacion Ragasa
Abstract/Summary
The insecticidal activity of the crude extracts prepared by successive extraction of the leaves of flame tree (Caesalpinia pulcherrima (L.) Sw.) in petroleum ether, acetone, methanol, and water was tested on cockroaches. Of the four crude extracts tested, petroleum ether, methanol, and acetone crude extracts were found to have considerable insecticidal properties. The petroleum ether crude extract was found to be the most toxic on cockroaches and was subsequently analyzed to isolate the insecticidal fractions which may be responsible for the activity. The interphase extractions of the organic components in the petroleum ether crude extract after chlorophyll was precipitated were done using two solvents petroleum ether and chloroform. The resulting semi-purified extracts were still toxic when tested on cockroaches. Partial isolation of the components of the semi-purified extract from petroleum ether was attained by flash chromatography. The components of the semi-purified extract from chloroform were isolated by column chromatography and were labeled as Fraction A, B, C, and D. Toxicity test result of the fraction showed that Fraction C gave the highest percentage mortality. Preliminary characterization of Fraction C by NMR spectroscopy indicated the presence of hydrocarbons, i.e. -CH2 and -CH3 groups as shown by the peaks at high field, atLof around 0.90 ppm.
Abstract Format
html
Language
English
Format
Accession Number
TG01243
Shelf Location
Archives, The Learning Commons, 12F Henry Sy Sr. Hall
Physical Description
59 leaves; 28 cm.
Keywords
Insecticidal plants; Pride-of-Barbados (Plant)
Recommended Citation
Alcantara, J. P. (1984). A study on the insecticidal property of the leaves of flame tree (Caesalpinia Pulcherrima (L.) Sw.). Retrieved from https://animorepository.dlsu.edu.ph/etd_masteral/1027