Fumigant toxicity and phytochemical analysis of Petiveria alliacea (Linneaus) leaf and root bark oil on adult Culex quinquefasciatus

Abstract

The result obtained shows that the oil extract of Petiveria alliacea at all concentrations had a significant effect on the adult mosquito for fumigant toxicity with percentage mortality range of 75.00–100% within a 2-h exposure period (P < 0.05) for the leaf extract and 81.67–100% mortality for the root bark extract. The synergistic effect of the leaf and root bark oil was also investigated. The lethal concentration (LC50) of the leaf, root, and synergistic effect of leaf and root oil extract required to kill 50% of the adult Culex quinquefasciatus was 0.45 ml, 0.53 ml, and 0.47 ml, respectively.