Upadhyay et al., 2012 14

In the present investigation insecticidal potential and oviposition inhibition efficacy of stem, root and flower extracts of Capparis decidua was evaluated against the rice weevil Sitophilous oryzae. For this purpose different bioassays were conducted and adult insects were exposed with varying doses of each extract. In bioassays on an average 90-95 % mortality was obtained in various solvent extracts which found to be dose dependent. Further each extract has significantly repelled large no. of insects at a very low dose. It is due to volatile action of diverse chemicals present in Capparis decidua having different functional groups. When female insects of Sitophilous oryzae were exposed with sub-lethal doses of above extracts it also significantly inhibited oviposition in susceptible females and disallow emergence of F1 individuals by blocking the development. However, % ODI (oviposition deterrence index) obtained was very high i.e. 40.51 to 81.83%. Therefore, it can be concluded that above plant species can be used for isolation of bio-pesticides to control pulse weevil population. For this purpose, constituent’s level study along with structure activity relationships of natural products is to be required for finding wider insecticidal performance and efficacy of C. deciduas not only against Sitophilous oryzae but also against all other stored grain insect pests