Corn cob granules coated in BTI, the Bits (do not last long) provide a punch, turning water black with larvae to a clear pool void of future mosquitoes. Mosquito Bits® are now labeled to control fungus gnats in plant beds or pots! Utilizing a similar mode of action for control of mosquito larvae, the Bits, either sprinkled on the soil's surface or mixed with potting soil prior to planting, will kill fungus gnat larvae with the same safety and target-specific control offered for mosquito larvae.