Fungus Gnat

Natural Habitat

Damp, humid environments rich in organic matter. Commonly found indoors around houseplants, rotting wood, and excessive moisture.

Diet & Feeding

Adult fungus gnats typically do not feed or feed on liquids, while their larvae feed on fungi, decaying organic matter, and plant roots.

Behavior Patterns

Adults are weak flyers and tend to remain near host plants. Larvae live in the soil and can damage tender roots of plants, especially seedlings. They have a short life cycle, typically 3-4 weeks from egg to adult.

Risks & Benefits

Potential risks include damage to plant roots, especially in nurseries and greenhouses, and can be a nuisance indoors. They do not bite humans or transmit diseases. No significant benefits are typically associated with their presence in indoor or managed plant environments.

Identified on: 9/17/2025