University of Florida

Fungus Gnats


  • Adult: slender, delicate, "mosquito-like" insects with long antennae, found in damp places where decaying vegetation abounds.
  • Egg: laid in fungi, decaying organic matter, or other damp locations.
  • Larva: small and whitish with a distinct head, found in decaying vegetation.
  • Damage: of little economic importance, larvae may feed on roots or seed.

Fungus Gnat Picture

Fungus Gnat
Image #44.
Fungus gnat, adult-

are not pests but occur commonly in seep-irrigated tomato fields where larvae breed in upper surface of moist soil (courtesy of E. Vasquez).