Fungus Gnat

Natural Habitat

Damp, rich soil, especially in potted plants, greenhouses, and areas with decaying organic matter. They are often found indoors near houseplants.

Diet & Feeding

Adult fungus gnats typically do not feed or feed on liquids. Larvae feed on fungi, decaying organic matter, and sometimes the roots of plants.

Behavior Patterns

Adults are weak fliers and are often seen near the soil surface or hovering around plants. They are attracted to light. Females lay eggs in moist soil. The larval stage is spent in the soil, feeding. The lifecycle from egg to adult can be as short as 18-20 days under ideal conditions.

Risks & Benefits

Potential risks: - Nuisance: Adults can be annoying, flying around indoors. - Plant damage: Large infestations of larvae can damage the roots of seedlings and young plants, leading to wilting or stunted growth. - Disease vectors: While not common, they can potentially transport fungal spores from one plant to another. Benefits: - Decomposers: Larvae play a role in breaking down organic matter in their natural outdoor habitats.

Identified on: 11/29/2025