Citation:Paranagama, P.A., Abeysekera, K.H.T., Nugaliyadde, L. and Abeywickrama, K.P., 2004. Repellency and toxicity of four essential oils to Sitophilus oryzae L. (Coleoptera: Curculionidae). Journal of the National Science Foundation of Sri Lanka, 32(3-4): pp. 127-138.