Gnat Nix! is the only scientifically Proven, environmentally friendly fungus Gnat control product on the market. Trials at Kansas university have shown that used as a top dressing, Gnat Nix! is an effective physical barrier against fungus gnats. Gnat Nix! controls gnats at different points of their lifecycle, preventing adult emergence from Hatching larvae & deterring females from laying eggs in the growing media. As a result, their lifecycle is interrupted & its Population is significantly reduced.