balEnce BioPesticide is a host-specific pathogen that kills adult flies and fly larvae but is safe for humans, animals, beneficial insects, and the environment. balEnce is available in a concentrated liquid spray for adult flies and fly larvae.
The active ingredient in balEnce, Beauveria bassiana, is a fungal spore that infects the adult fly and fly larvae on contact. The fungus consumes and kills the insect. Flies do not develop resistance to balEnce as with most chemical pesticides so rotation of pesticides is not necessary or desirable.