Fungus Gnat
Bradysia spp. or other genera within Sciaridae, Mycetophilidae, or Ditomyiidae
- Order & Family
- Order: Diptera, Families: Sciaridae, Mycetophilidae, Ditomyiidae (most commonly Sciaridae)
- Size
- 2-8 mm (adults typically 2-3 mm)
Natural Habitat
Damp, rich, organic matter, often found indoors by houseplants, greenhouses, or decaying wood/leaves outdoors. Adults are attracted to light.
Diet & Feeding
Larvae feed on fungi, decaying organic matter, and sometimes plant roots (especially fine root hairs). Adults do not feed or feed on liquids.
Behavior Patterns
Adults are small, dark, slender flies that fly weakly and erratically, often seen near potted plants or windows. Larvae live in the soil or growing medium. They have a short lifespan as adults (about a week).
Risks & Benefits
Risks: Larvae can damage plant roots, especially in seedlings and young plants, leading to wilting, stunted growth, or even death of the plant. They can be a nuisance indoors. Benefits: In natural environments, they contribute to the decomposition of organic matter and can be a food source for other insects.