Fungus Gnat

Damp, rich organic matter, often found in potting soil of houseplants, greenhouses, and moist outdoor environments.

Larvae feed on fungi, decaying organic matter, and sometimes plant roots; adults do not feed and live only a few days.

Adults are weak flyers and tend to stay close to where they emerged. They are attracted to light and moisture and are often seen near windows or around potted plants. Females lay eggs in moist soil. Larvae develop in the soil. The life cycle from egg to adult is usually 3-4 weeks.

Potential risks include being a nuisance, especially in large numbers. Larvae can damage plant roots, especially in seedlings and young plants, leading to wilting or stunted growth. They do not bite humans or transmit diseases. Benefits are minimal but they can aid in the decomposition of organic matter in outdoor settings.