No, this product does not trap mosquitoes. It acts as a dissemination unit. Mosquitoes will lay their eggs inside the water-filled units when sitting on the powdered gauze. They will be contaminated by the larvicide and fungus powder. They will fly out of the Trap and spread the larvicide that sticks to their body to surrounding breeding sites when laying more eggs. The fungus will kill the mosquitoes after a few days.