Fungus gnat

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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. They can be controlled by Hypoaspis miles or biological larvicide that kills the gnats in their larval stage.