Bonide 420 Fog-Rx Propane Insect Fogger Propane insect fogger Produces a dense fog that permeates foliage, cracks and other hiding places, collapsing insect populations and leaving a safe, pest free environment Effective on mosquitoes, flies, gnats and moths; can be used at picnics, camp sites, outdoor events and for gardening treatments Made of durable nylon with a translucent bowl Leaves no active residue