Flies in the catering industry – causes, risks and sustainable solutions without chemicals

October 6, 2025
Fliegen in der Gastronomie
Published on  Updated on  

Why flies in the hospitality industry are more than just annoying

Flies are among the most common hygiene pests – and pose a serious risk in restaurants, commercial kitchens and canteens .
Even a few animals can transmit bacteria, viruses or fungal spores and thus contaminate food, work surfaces or dishes.

Frequently detected pathogens:

  • Salmonella
  • Listeria
  • E. coli bacteria

An infestation often becomes visible quickly – and this can have serious consequences:
Not only hygiene, but also the trust of guests and the results of food inspections are at stake.
Therefore, prevention and quick action are crucial before an infestation spreads.

Where do flies come from? Typical causes in kitchens and restaurants

Flies need very little to feel comfortable: warmth, moisture and organic residues.
They often find ideal conditions in kitchens, dishwashing areas or storage rooms – even in well-maintained businesses.

Common causes:

  • Open waste containers or food leftovers
  • Contaminated drains, gutters or garbage rooms
  • Leaky doors, windows or ventilation shafts
  • Light sources that attract insects
  • Residues of organic substances in production or storage areas

Especially in summer, an infestation can develop within a few days.
Even a forgotten waste bin or a damp rag is enough to invite flies to lay their eggs.


Why chemical agents are not a sustainable solution

Chemical insecticides or sprays must not be used in kitchens or guest rooms – they are

  • not residue-free ,
  • potentially harmful to health ,
  • and may violate food and HACCP regulations.

Many chemical agents also only have a short-term effect and do not combat the eggs or larvae .
A truly sustainable solution must be safe, environmentally friendly, and usable during ongoing operations – without compromising food hygiene.


Chemical-free alternatives: Modern LED UV technology for kitchens and guest rooms

A proven and hygienic method for fly control is the use of LED UV light systems .
These devices use targeted UV wavelengths to attract flies and securely bind them to an adhesive film – without electric shock, splinters or toxins .

The big advantage:
They can remain in operation permanently , operate quietly , are energy efficient and require little maintenance .

Advantages at a glance:

  • ✅ Chemical-free and residue-free effect
  • ✅ No smells or fumes
  • ✅ Safe for staff and guests
  • ✅ Easy to clean and maintain
  • ✅ Continuous operation possible even during service hours

This ensures long-term hygiene – without interfering with the kitchen routine or causing disruption to the guest area.


Practical example: UV-LED systems with shatter protection for the catering industry

The use of UV LED devices with shatter protection has become established in many catering establishments.
These devices can be installed in inconspicuous locations, such as above doors, in storage rooms, or near ventilation systems.
There they ensure continuous control of insect numbers without disturbing guests.

A proven example from practice is the NK DECO 151 LED UV device with shatter protection .
It meets the requirements of HACCP-compliant pest prevention , operates whisper-quietly and requires little maintenance .
Thanks to the easily replaceable adhesive film, disposal is hygienic – without any direct contact with the insects.

(Note: The device is available in various colors and covers up to 60 m² of room area.)


Tips for dealing with flies hygienically in restaurants

In addition to technical measures, operational organization is crucial to prevent fly infestation:

  1. Regular cleaning:
    Clean work surfaces, floor gutters and drains daily.
  2. Waste management:
    Seal waste immediately, dispose of it regularly and clean containers.
  3. Check ventilation & seals:
    Seal doors and windows, install airlocks or fly screens.
  4. Adjust light sources:
    Flies are attracted to warm light – UV or cold LED light is less attractive.
  5. Documentation:
    Document all measures in the hygiene concept (HACCP compliant).


Conclusion: Stay fly-free – systematically and without chemicals

Flies in restaurants are a visible sign of hygiene deficiencies – and can alert guests and authorities alike.
With modern LED-UV technology combined with consistent cleaning and prevention, infestation can be controlled permanently, silently and in an environmentally friendly manner .

This way, your business remains hygienically safe, compliant with standards, and hospitable – without any chemicals.

Further specialist articles can be found at: Kæferling Academy Guide

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