Abstract: Adult samples of a species destroying the cocoons of the mulberry silkworm in store were identified as Anthrenus oceanicus Fauvel 1903 (Coleoptera: Dermestidae). The beetles were treated with a commercial dust formulation containing 0.60% permethrin and an aerosol containing tetramethrin (0.20%), Phenothrin (0.12%) and allethrin (0.25%). The commercial dust formulation was applied at 0mg, 20mg, 100mg and 200mg while the aerosol was sprayed for 0, 1, 2, 3 and 4 seconds. These two formulations were effective in killing the beetles even at the lowest concentrations applied.