Cynaropicrin, isolated from the herb Tricholepis glaberrima DC proved to be a potent feeding deterrent on testing against 4th instar larvae of Bihar hairy caterpillar, Diacrisia obliqua Walker (Lepidoptera: Arctiidae) and the Erisilk worm Philosamia ricini Hutton (Lepidoptera: Saturniidae). The compound retained appreciable feeding (40%) up to two days from treatment.