Fly Eliminators - 4.5 UnitsARBICO Organics Fly Eliminators are tiny, naturally occurring insects that feed on fly pupae. This predation disrupts the life cycle of the fly and causes their population to plummet. To get a clear picture of how they work it is important to understand the life cycle of the fly: The fly lays an egg that looks like a speck of sugar. Within hours, the egg develops into a microscopic larva (a maggot). The maggot is light sensitive and will then burrow