An insecticide fog can be created with the use of propane foggers, electric foggers or by using a pyrethrin aerosol. For indoor use, fogging will give a quick knock down of many targeted pests: ants, roaches, spiders, fleas and ticks. Flying pests such as flies, gnats and mosquitoes are also targeted with fogging indoors. Outdoor applications usually target mosquitoes or other biting pests that ruin outdoor activities. With the spread of West Nile Virus and other diseases, many people are treating patios, lawns, shrubs and other outdoor surfaces for mosquitoes.
For small porches, a pyrethrin aerosol will suffice but for larger areas a machine that creates a fog or mist is more often desired. There are two basic foggers used for killing outdoor flying pests: thermal fogger and cold fogger.
A thermal fogger uses heat to create and disperse the insecticide mist. This mist resembles smoke as it dispenses from the device. Thermal foggers are generally considered unsafe for indoor use but are very popular for outdoors. Burgess and Bonide Thermal Foggers are among the most popular items used in outdoor mosquito control for home owners. Thermal Foggers are available in electric and propane driven fog machines. These economical machines can use 10% Permethrin concentrate, Ready to Use .5% Fog and Resmethrin Fogging Solution to kill mosquitoes, gnats, biting flies and other outdoor pests. When choosing a material for your thermal fogger, make sure that the product is labeled for this type of fogger. Not every insecticide can be used in thermal foggers.
A cold fogger is a machine that creates an insecticide mist
without the use of heat. This application is cleaner than a thermal fog can be used
both indoors and outdoors. Restaurants, warehouses and food processing plants will
often fog to quickly knock down pests such as cockroaches,
beetles, weevils (various pantry pests,)
fleas and spiders.
For best results, use only 1 ounce of fogging solution per 1,000 cubic feet. Using too much material not only makes a mess and wastes money but
actually is counter-productive. Fogging creates very tiny droplets that are
supposed to float for a long time. Using too much material creates a very wet
environment; the droplets then create a rain-like application that does not float
well and can make quite a mess. You want your fog to float as long as possible to
exterminate as many pests as it can reach.