Fungus Gnat

Natural Habitat

Damp environments rich in organic matter, such as potting soil, greenhouses, and compost piles.

Diet & Feeding

Adults primarily feed on water and nectar or do not feed at all; larvae feed on fungus, decaying organic matter, and sometimes plant roots.

Behavior Patterns

Adults are weak fliers often seen running across soil surfaces or resting on leaves. They have a short life cycle of about 3-4 weeks, laying eggs in moist soil where larvae develop.

Risks & Benefits

Adults are mostly a nuisance; however, larvae can damage plant root systems and transmit soil-borne diseases like Pythium. They benefit the ecosystem by helping decompose organic matter.

Identified on: 6/5/2026