Mortein PowerGard Flea protects for up to 9 months and kills fleas and flea eggs. Benefits : Contains unique insect growth regulator (IGR) to kill flea eggs and break the breeding cycle.- Locking tab releases the entire can contents as a fine mist that kills flea eggs and adult fleas where they hide. Unique formulation containing fenoxycarb also kills flea eggs and prevents reinfestation for up to 9 months by breaking the flea breeding cycle. Flea life cycle 4 Stages Eggs, Larvae, Pupae & Adults. Adults lay eggs on the host and fall into the carpet. Eggs hatch into Larvae (2-4 days). Larvae feed on organic debris (4-12 days). Pupae emerge as biting adults after 5-7 days. The IGR (fenoxycarb) breaks the life cycle so no eggs hatch and no larvae mature How to use: 5 simple steps to effective flea control. Close doors and windows. Place can on newspaper in centre of room. Push locking tab into place. Leave room and close door for 3 hours. Remove dead insects by vacuuming.