When fly infestations are a problem, hygiene is king. Keep everything clean and all food stored safely and take a multi-pronged approach to control.
There are multiple products you can use to control flies, such as
Control The Pest
In the majority of cases, DIY control is perfectly adequate and effective. There will be cases such as large poultry units, landfill sites and institutions where professional input is essential.
Which method of control you choose will depend on factors such as personal preference, size and location of the infestation and whether or not food and people are involved.
The order in which you might approach fly control would be as follows:
Work systematically through the programme outlined above in the hope of achieving control before insecticide sprays are required.
Use pesticides safely and always read and understand the label
The common house fly is a world wide vector of a range of debilitating diseases in humans and animals.
The housefly is associated with rotting, fermenting organic matter of high protein content. It can be found in suitable habitats throughout the world.
When a housefly feeds, for instance on faeces, it takes organisms into it's gut. Particles also adhere to it's bristles, feet and body surfaces.
At a subsequent feed, perhaps on food prepared for human consumption, the fly will feed and regurgitate fluid over the food. That fluid will contain organisms from previous meals. It will also defecate continuously, contaminating the food even further. This is the most common way in which disease organisms are transferred from an infected source to humans.
Where houseflies are gathering in significant numbers, it is usually as a result of a breakdown in hygiene standards somewhere in the locality.
The most important aspect of fly control is to trace and rectify the source of the problem. This may be very localised - blocked or dirty drains, open rubbish containers,decaying organic debris, a dead bird or rodent or perhaps a local farm may be the source.
Entry into buildings can be restricted by fitting suitable fly screens.