Ti. Ofuya et Ie. Okuku, INSECTICIDAL EFFECT OF SOME PLANT-EXTRACTS ON THE COWPEA APHID APHIS-CRACCIVORA KOCH (HOMOPTERA, APHIDIDAE), Anzeiger fur Schadlingskunde, Pflanzenschutz, Umweltschutz, 67(6), 1994, pp. 127-129
The insecticidal activity of acetone extracts of Cymbopogon citratus (
DC) Stapf., Momordica charantia L., Zingiber officinale (Ros.), Xylopi
a aethiopica (Dunal) A. Rich., Ocimum gratissimum L. and Aframomum mel
egueta (Ros.) K. Schum against the cowpea aphid, Aphis craccivora Koch
was investigated. Z. officinale and A. melegueta extracts had the gre
atest effect in causing mortality of A. craccivora and inhibiting its
reproduction. Extract from M. charantia caused high nymphal mortality
whilst extract from C. citratus also caused significant nymphal mortal
ity, reduction of life span of adult aphids and inhibition of aphid re
production.