Fungus Gnats on Vegetable Plants | eHow.com

Fungus Gnats on Vegetable Plants eHow.com: "According to Utah State University Extension, two biological control agents that keep fungus gnat larvae in check are the insect-attacking fungus Beauvaria bassiana (Naturalis by Troy Biosciences) and the bacterial pathogen Bacillus thuringiensis var. israelensis (Gnatrol by Abbott Laboratories and Knocks Out Gnats by Gardens Alive). These products are used to treat the soil, and are safe to use right up to harvest time."