Madras Agricultural Journal
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Studies on the repellent properties of Calotropis gigantiea R. Br. Plant parys against important storage insect pests

Abstract

                                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.

Key words : Milkweed plant, plant part powders, storage insect pests, repellency.

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