How to Identify FUngus Gnats

Fungus gnats are a common indoor pest, especially if you have house plants. Adult fungus gnats and their larvae thrive in the warm, moist soil of potted plants in your home. Though called fungus gnats, they will eat more than just fungus with a diet that includes algae, decaying plant matter, and plant roots.

Adult fungus gnats look like tiny mosquitoes but do not bite. They don’t cause diseases or property damage, but they are a nuisance in large numbers. You can find their translucent, worm-like larvae in the top two or three inches of soil around the plants. The life of an adult fungus gnat is a short, yet productive ten days. A female typically lays 200 eggs in her lifetime. It does not take long to have a noticeable problem.

Fungus Gnats


Fungus gnat infestations can be a problem on Long Island, NY, and it’s important to be aware of the signs of their presence so you can take steps to eliminate them. Some common signs of a fungus gnat infestation include:

  • Seeing live fungus gnats: If you see small, black flies flying around your home or buzzing near windows and doors, it’s a clear sign that you have a fungus gnat infestation.

  • Finding fungus gnat eggs: Fungus gnats lay eggs in moist, decaying matter, such as overripe fruits and vegetables or potted plant soil. If you find small, white eggs in these areas, it could be a sign of a fungus gnat infestation.

  • Seeing fungus gnats on your plants: If you notice fungus gnats on your plants, it could be a sign of an infestation.

  • Smelling a foul odor: Fungus gnats are attracted to decay and may lay eggs in decomposing matter, which can produce a foul odor. If you notice a bad smell in your home, it could be a sign of a fungus gnat infestation.


If left unchecked, a fungus gnat infestation can become a nuisance and pose a number of risks. Some of the risks associated with a fungus gnat infestation on Long Island, NY include:

Damage to Plants

Fungus gnats feed on plant roots and can damage plants, particularly potted plants.

Property Damage

In some cases, fungus gnat infestations can lead to damage to the structure of a home, such as holes in walls or damage to insulation.

Contamination of Food

Fungus gnats may crawl into food or stored items in search of moisture, leading to contamination.


Fungus gnats can be a nuisance, buzzing around and landing on surfaces, making it difficult to enjoy your home.


Knockout Pest Control is your local expert at knocking out fungus gnats, and we keep them down for the count. Every member of our team receives over 100 hours of classroom instruction and in-the-field training so you are guaranteed a knock out punch to your pest problem every time. 

Get Rid of FUNGUS GNATS Fast
Call 1-800-244-PEST (1-800-244-7378)

We respond like every pest problem is an emergency with fast, 24 hour service seven days a week.

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