INSECTICIDAL ACTIVITY OF JATROPHA SEED OIL AGAINST CALLOSOBRUCHUS MACULATUS (FABRICIUS) INFESTING PHASEOLUS ACONITIFOLIUS JACQ

Abstract

The Pulse beetle, Callosobruchus maculatus (Fabricius) (Coleoptera: Bruchidae) is a cosmopolitan insect pest of
Phaseolus aconitifolius Jacq. (Mataki). The insect multiplies very rapidly in storage where it causes very high
losses. In the present investigation insecticidal activity of Jatropha seed oil against Callosobruchus maculatus has
been carried out. The eggs of C.maculatus were more susceptible to Jatropha oil and shows mortality to all
selected dosage. Jatropha seed oil was highly toxic to the eggs of C. maculatus (F = 76.17; p< 0.001) at all
dosage levels compared to other pre-adult stages (larvae: F = 65.13; p< 0.001, Pupae: F = 17.43; p< 0.001).