Common Fungus Gnat

Natural Habitat

Damp environments rich in organic matter, such as potted plants, greenhouses, and gardens.

Diet & Feeding

Larvae feed on fungi, organic mulch, and occasionally plant roots; adults consume liquids but do not bite.

Behavior Patterns

Weak fliers often seen running across soil surfaces or resting on leaves; they have a short life cycle of about 3-4 weeks.

Risks & Benefits

Adults are mostly a nuisance; however, larvae can damage young plant roots and transplant seedlings in high populations. They do not pose health risks to humans.

Identified on: 6/5/2026