What Causes Gnats?


Factors that Contribute to a Gnat Infestation

The very similar factors that create suitable gnat habitat are the same for almost all insects – the presence of preferred sources of food, moisture and protection. Therefore, the answer to our question for the gnats examined here are much the same, except for fungus gnats.

Moist Soil - The principle difference with the fungus gnats is the typical breeding and development site being moist soil that promotes plant root and soil fungi growth rather than the organic matter associated with foods, food wastes and products of decomposition and fermentation.

Decomposing Organic Matter - It is important to realize that wastes and sewage from a broken plumbing pipe that enables organic wastes to accumulate in the soil may be the direct cause of moth flies and phorid flies.

In summary, fruit flies, phorid flies and moth flies are caused the attractiveness of moist organic matter, fruits, and vegetables of some sort.


Dig Deeper on Gnats

Do Gnats Bite?

Black Gnats

Gnat Eggs

Fungus Gnat Life Cycle

Fungus Gnat Larvae

How to Get Rid of Gnats Outside

Gnat Infestation

Gnat Traps

Why Do Gnats Fly in Your Face?

What Do Gnats Look Like?

Connect with Us

Our customer care team is available for you 24 hours a day.


Find a Branch

Our local technicians are the pest experts in your area.

Get a Personalized Quote

We will help you find the right treatment plan for your home.

Home is where the bugs aren't™


Pest ControlTermite ControlPrevent and Protect


Browse All Pests

© 2021 Orkin LLC

Terms of UsePrivacyAccessibility StatementCareers