A single house fly can carry over one million bacteria. More than 60 different diseases can be transmitted by flies, from salmonella to dysentery. Most flies can reproduce quickly in warm weather. To keep fly populations under control, you must limit the places where they can breed and feed. Chemicals are only rarely required in residential situations. Their use generally leads only to short-term control because they target adult flies and leave the larval fly stages intact and capable of producing the next generation of adult flies.

House flies are generally found in greatest numbers during the hotter summer months. House flies have sponging mouth parts and eat solid food by first liquefying it with their saliva. Almost all nuisance fly species are best controlled by eliminating larval developmental sites and reducing adult attractants in the buildings or other areas of concern. Areas such as garbage cans should always be placed at some distance from a building entrance. Preventative measures such as screens, doors, and air curtains should be used to prevent flies from entering buildings.