They have a part in spreading cholera, and many other diseases. The general size and appearance of the house fly is well known to most. It is normally the common fly entering homes in warmer weather. The house fly feeds and breed most extensively in manure, garbage, and fermenting crop wastes. If disease germs are in these materials, or in others that they frequent, the flies get them on their hairy legs and feet and in their digestive tracts.
Flies contaminate humans food by walking over it.
Pupation may last 4 to 6 days. There can be 10 to 12 generations in a summer. Adult flies live approximately 2 to 4 weeks, depending upon temperature. Although flies have been known to travel up to 20 miles from a breeding source, most do not move more than 1 to 2 miles. These are listed in order of lasting effectiveness.