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Feeding inhibition property of methanolic leaf extract of 6 plant species, seed extract of neem and amrutgaurd (need lased commercial product) was tested againsi last instar larvae of three major forest insect pests, by leaf disc bioassay in laboratory. Though. all the extracts were found to inhibit feeding which was evident by reduced food consumption and corresponding leaf protection over feeding in control, but leaf extract of Anona squamosa proved to be very effective with 1000 per cent, 85. Il per cent and 8847 per cent leaf protection against bamboo leaf roller Crypsiptya coclesalis, poplar defoliator Clostera cupreata and Ailanthus webworm Atteva fabriciella, respectively. The leaf extract of Lantana camara var; aculeata, Calotropis procera ssp. fistulosa and Ipomoea carnea were also effective in protecting foliage when compared to seed extract of neem and amrutgaurd.