ABSTRACT
The larvicidal activity of various solvent (ethanol, ethyl acetate and n-hexane) extracts of Persea americana seed and Chromolaena odorata leaves against Aedes vittatus mosquito was analysed. The most potent solvent (n-hexane) extracts of both plants were fractionated using column chromatography and most effective fractions isolated and identified using Gas Chromatography Mass Spectrometry and Fourier Transform Infrared techniques. Phytochemical screening revealed the presence of steroids, cardiac glycosides and terpenoids in all the extracts. The larvicidal bioassay of Persea americana seed gave LC50 values of 0.827ppm, 1.799ppm and 2.732ppm for n-hexane, ethanol and ethyl acetate extracts respectively, while, Chromolaena odorata leaf extract had LC50 values of 1.835ppm, 3.314ppm, and 5.163ppm for n-hexane, ethanol and ethyl acetate respectively. Column chromatographic fractionation of most potent n-hexane (crude) extracts of both plants, showed increased activity in some of the fractions of Persea americana (nHPa6) and Chromolaena odorata (nHCo6) which showed higher mortality, with LC50 values of 0.486ppm and 1.308ppm respectively. GC/MS analysis of components in nHPa6 and nHCo6 showed oleic acid as the most abundant, in fractions of both plants. The FTIR analyses of nHPa6 and nHCo6 showed absorption bands of the functional groups present, which included; alcohol, alkane, alkene, alkyl halide, aldehyde, carboxylic acid and carbonyl ester, thus, supporting the GCMS result. The n-hexane, ethanol and ethyl acetate extracts of P. americana seed and C. odorata leaves have shown good larvicidal activity and should therefore be further exploited for the control of mosquito larvae.
Background of the Study
Teachers often spend long hours standing while delivering lessons, leading to i...
Abstract
Graphic presentations have a powerful impact on a viewer’s attitude, and this imp...
Background of the Study
Natural Language Processing (NLP) has made significant strides in the field of artificial intellige...
Abstract
THE IMPACT OF SALES TRAINING PROGRAMS ON SALES PERFOR...
Background of the study
Student retention in secondary schools is a significant concern in many parts of Nigeria, including Ganye Local G...
Chapter One: Introduction
1.1 Background of the Study
Deforestation poses a significant environmental challenge in Nigeria, wit...
BACKGROUND OF THE STUDY
Computers with Internet access have succeeded in facilitating human communication. The te...
Background of the Study
Timetable scheduling in educational institutions is a complex task that involves assigning courses to available c...
Background of the Study
Influencer partnerships in digital marketing involve collaborating with individuals who have signif...
ABSTRACT
This research work was designed to determine the role of Small-scale business operation in the developme...