Repellant activity of the milkweed plant, Calotropis gigantea R.Br. was evaluated against important storage pests such as Callosobruchus maculatus (Fab.), Sitophilus oryzae Linn, and Tribolium castaneum (Herbst). Leaf, flower, stem, root and whole plant were Soxhlet extracted by using petroleum ether solvent and repellency test was carried out using glass olfactometer. Whole plant extract at 5 per cent. concentration had maximum repellent effect followed by leaf, flower, stem and root extracts.
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