The efficacy of oil extracted from the flowers of Tilia cordata was evaluated in the laboratory against Sitophilus granarius infesting stored wheat grains. Flower extracts from T. cordata were obtained though the soxhlet extraction method using methanol and n-hexane as the solvent. Each of the extracts was tested by exposing six pairs of adult beetles to various levels of 0.5, 1.0, 2.0 and 4.0 ml corresponding to 3.0, 6.0, 9.0 and 12.0% v/w concentrations admixed with 25g wheat grains in three replications respectively. Control group treatment was set along. The results showed that oviposition and percentage egg hatched were significantly (P <0.05) suppressed on seeds treated with higher treatment level of extracts. Flower extract with n-hexane at 4.0 ml (12.0% v/w) 25g wheat grains was most effective in suppressing oviposition and egg hatched. Therefore, T. cordata exhibit promising degree of oviposition deterrent and ovicidal properties and thus, have a great potential for use as a plant-based bio-insecticide as an alternative to synthetic insecticides for controlling S. granarius infestation on stored wheat grains.