Safety of selected insecticides to Oecophylla smaragdina workers (minor-major) (Hymenoptera: Formicidae) was evaluated using dry film method at 1, 4, 8, 12, 16, 20 and 24 hours after treatment (HAT). Results showed that Lambda cyhalothrin and Thiamethoxam caused 100 per cent mortality within 1h in both the minor and major workers, which was significantly higher than untreated check. Imidacloprid was comparatively safer and caused 100 per cent mortality of both the castes of the weaver after 12h. However, Azadirachtin caused 100 per cent mortality only after 12h with low death rates indicating that it is the safest of all the insecticides tested for both the castes of weaver ants and hence might be the first choice for weaver ant used pest management strategy.