Fungus Gnat

Natural Habitat

Damp, decaying organic matter, often found in potting soil of houseplants, greenhouses, and compost piles.

Diet & Feeding

Larvae feed on fungi, decaying organic matter, and plant roots; adults do not feed significantly and primarily focus on reproduction.

Behavior Patterns

Adults are weak fliers and are often seen near the soil surface or flying around plants. Larvae live in the soil. They are attracted to light and moisture. Their life cycle typically takes 3-4 weeks from egg to adult.

Risks & Benefits

Risks: Larvae can damage plant roots, especially in seedlings and young plants, leading to wilting, stunted growth, and even death. They can also spread plant diseases. Benefits: They play a role in decomposition of organic matter in natural environments.

Identified on: 9/24/2025