A commercial preparation of neem extract, Margosine‐O, was tested for its antifeedant activity against 3 adult orthopteran insects, Carolina grasshoppers, walkingsticks, and field crickets. Twenty μ1 of 1, 5, 10, 20, and 50% solutions of extract were applied to 2 × 2‐cm corn‐leaf squares in tests with the grasshoppers and crickets, and to 2 × 2‐cm white oak‐leaf squares in tests with walkingsticks. Concentrations of 10, 5, and 5%, respectively were necessary to produce a significant reduction in feeding on the mixed sexes of Carolina grasshoppers, female walkingsticks, and female crickets, respectively. The levels of neem extract necessary to inhibit feeding by these 3 species were many times greater than the concentrations reported to be effective for inhibiting feeding in the desert locust and African migratory locusts.