How to Keep Flies Out of Your Food Business

Pests of any kind can hinder your business. Here’s how to keep flies out!
March 14, 2022

If you’ve ever dealt with flies in your business, you know how much trouble these small insects can present. They get inside easily, multiply quickly and contaminate surfaces they land on.

Customers also find flies annoying, and rightly see them as dirty. That’s bad news for any establishment that sells food!

The problem with flies

You may not think flies are a big deal, but in reality, flies are damaging in significant ways. They can:

  • Spread disease: Flies transfer pathogenic microorganisms, including bacteria that make people sick, simply by landing on food contact or preparation surfaces. Their bodies, eggs, faeces and vomit all play a part in flies’ ability to transfer more than 100 pathogens including E. coli, Salmonella and Shigella. Many of these diseases involve symptoms such as vomiting, stomach cramps, diarrhoea, fever and dysentery.
  • Contaminate food: When flies land on food, they immediately vomit on it — this allows them to dissolve and slurp up food, as they can’t chew. Flies’ stomachs contain anything from garbage to faeces, germs, rotting meat and decayed organic matter, leading to food poisoning for your customers.
  • Breed rapidly: A female house fly can produce 1,000 eggs in her roughly 28-day lifetime. It only takes 10 days for larvae to mature into adults. In short, flies reproduce at a rate that can become uncontrollable for a business.
  • Hurt your reputation and bottom line: If you have flies in your establishment, you won’t have customers for long — no one wants to constantly swat pests away from themselves and their meal. Flies can damage your reputation, and cost money in lost revenue as well as fees associated with failed health inspections.

Signs of a potential issue

You can likely pinpoint an existing fly problem simply by seeing the insects buzzing around. However, you may also be able to predict a problem if you or an employee spot a cluster of larvae or eggs, which can be seen with the naked eye.

So, what do fly eggs and larvae look like?

  • House fly larvae (maggots) resemble small, white or pale worms
  • House fly eggs look like grains of white rice
  • House fly pupae are dark in colour with hard outer shells

How to prevent flies from getting in

Flies are attracted to food, sugars in alcohol, garbage, scraps and to any area that promises a meal! Make your establishment inhospitable to flies by following a few simple rules:

  • Never leave waste or unused food lying around your business
  • Keep dumpsters as far from the building as possible, and ensure you use leak-proof and pest-proof garbage containers
  • Regularly clean and sanitise garbage containers and recycling bins
  • Clean up food spills as soon as they happen
  • Clean food contact equipment at least once per day
  • Keep doors, windows and any other openings sealed shut
  • Ensure alcohol containers are sealed; if alcohol bottles have spouts, cover them tightly with plastic when not in use

Your establishment is probably already following these rules, as they’re just good business practice. Step up your cleaning and sanitising practices to keep flies and other pests away, and prevent food-borne illness.

How to get rid of flies

There are three main methods used for getting rid of a fly infestation:

  • Fly spray: While effective for killing flies, sprays can easily cause chemical contamination of food if they’re used near open food or food preparation surfaces. This means you must only use fly sprays when the whole area is not in use (e.g. after closing) and move all utensils, equipment or food out of the way first. After spraying, clean and sanitise any equipment in the vicinity.
  • Electrocutors: These attract flies, moths and other insects to the inside of the unit, and kill them with high-voltage electricity. The unit can’t hold many insects, though, so dead flies will often fall to the ground below. This makes it imperative to place electrocutors at least two metres from food preparation or storage areas, and empty them frequently.
  • Fly strips: These attract flies to sticky paper that traps them, which you can then throw away. Replace fly strips frequently, and wash your hands thoroughly after handling them.

Australian Institute of Food Safety (AIFS) members have access to a range of helpful food safety resources, including a Guide to Pest Prevention and Control, which covers tactics to get rid of flies and other pests that can disrupt and damage your business. Contact us to learn more about membership or to enrol in one of our nationally recognised Food Safety Courses.