QuickBayt(R) Fly Bait starts killing nuisance flies in as little as 60 seconds*. QuickBayt(R) Fly Bait also kills flies resistant to organophosphates and carbamates. It's ready to use indoors or outdoors as scatter bait, in bait stations, or as a paint-on. QuickBayt(R) Fly Bait also contains two fly attractants to lure flies, and Bitrex(R), a bitter substance to help prevent accidental ingestion by children and animals.