EXTRACTIVES OF MILLEITIA FERRUGINEA, TEPHROSIA VOGELLII AND TEPHROSIA PENTAPHYLLA AGAINST THE BEAN BRUCHID, ZABROTES SUBFACIATUS

Abstract

Different extracts from seeds and aerial parts of Millettia ferruginea, Tephrosia vogellii and
T. pentaphylla were tested for insecticidal ;<::tivity against the bean bruchid, Zabrotes subfadatus, which is
a common pest of stored bean. Out of an extracts tested, acetone extracts of M. ferruginea and T. vogellii
seeds were the most active as 100% mortality of the been bruchid was observed. By using medium
p~essure liquid column chromatography, the active acetone extract of M. ferruginea seeds was further
fractionated and the different fractions were tested for their toxicity against the bruchid. When.the most
toxic fraction was subjected' to chromatographic and spectroscopic methods, it resulted in the
identification of rotenone as the most active compound against this pest.