Lava-Lite No-Gnats Fungus Gnat Control A house or office full of beautiful plants and potted flowers offers a calming environment; however, all that lovely moist soil is a perfect breeding place for fungus gnats and fungus gnat larvae. The adults lay their eggs in the damp warm soil or peat, soon to complete their life cycle and fill your room with small annoying black gnats, all looking for the next place to lay their eggs. It also offers the added benefit of being a pH neutral product that can be used with any household plant variety and its composition increases moisture retention. Choosing NO-GNATS is a sound ecological decision, with no harmful chemicals or pesticides - for natural gnat control.