Fungus Gnat

Natural Habitat

Damp, rich organic matter such as potting soil, compost piles, decaying leaves, and areas with excessive moisture. They are often found indoors near houseplants.

Diet & Feeding

Larvae feed on fungi and decaying organic matter, plant roots (especially fine root hairs). Adults do not feed or feed on liquids.

Behavior Patterns

Adults are weak fliers and often seen walking on surfaces or flying erratically near host material. Larvae live in the soil. They have a short life cycle (about 3-4 weeks from egg to adult) and can rapidly reproduce in suitable moist environments.

Risks & Benefits

Risks: Larvae can damage roots of houseplants, especially seedlings and young plants, leading to wilting, poor growth, or even death. They are primarily a nuisance pest for humans. Benefits: Play a role in decomposition in natural environments.

Identified on: 10/19/2025