Chemical, Toxicity and Antibacterial Studies on Methanol Extracts of Melanthera scandens, Ageratum conyzoides, Aspilia africana and Syndrella nodiflora

Abstract

Compositae species are applied as whole or part of the feed stock for animals and poultry. However, rabbits display varied preferences in their consumption of these plants, following the order of: Melanthera scandens (MS) > Synedrella nodiflora (SN) > Aspilia africana (AA) > Ageratum conyzoides (AC). This preference profile may be due to variation in chemical composition, flavor or toxicity of the plants. The rabbits in our farm feed on 100% MS or SN with excellent performance. This study, therefore, is set to: obtain the methanol extract of these plants, screen them for their antibacterial activity, determine their toxicity and investigate the chemical composition of their n-hexane fraction (volatile constituents).