Fungus Gnats

Fungus gnats are small, dark, short-lived flies, of the families Sciaridae and Mycetophilidae (order Diptera), whose larvae feed on plant roots or fungi and aid in the decomposition of organic matter. The adults are 2-5 mm long, and are important pollinators, and can also help spread mushroom spores. One control for fungus gnats is the product Gnatrol, which kills the gnats.

Nonchemical Control
Reduce the proportion of organic matter in your media, eliminate wet areas around germination chambers and floors under benches, reduce algal growth, practice good sanitation and inspect incoming plant material. Monitor adults with yellow sticky cards. Use Guardian Gnat Patrol