Insects and Mites

Fungus gnat larva close up

Fungus gnats – Larva

Fungus gnat larvae (Bradysia spp.) are white and legless, about 1/4 inch long when mature, and have a shiny black head. Larvae feed on fungi and decaying matter, often injuring bulbs, seedlings and plants with succulent stems and roots. Fungus gnats can be monitored using potato slices. Larvae present in infested plants or media can lead to prolonged emergence of adult flies.

Fact sheets:
Fungus Gnats and Shore Flies, University of Massachusetts
Fungus Gnats are Serious Pests, University of Connecticut
Managing Fungus Gnats and Shore Flies in the Greenhouse, University of
Connecticut

More Images of Fungus Gnats and Shore Flies, University of Connecticut
http://www.hort.uconn.edu/ipm/greenhs/htms/fgsfpics.htm