Fly trap Natural control, of a formidable effectiveness, especially conceived for the outside but can also be used in inside! Provided with a natural bait, this fly trap is respectful of the environment and does not capture the bees. The natural bait mixed with water in the trap attracts the flies that get trapped and end up drowning. Effective in a perimeter of 5 to 10 meters: Pour the contents of the bait in the trap, add the equivalent of half a cup of water, until the marking and mix. The bait generates agents that attract the most common flies. When the trap begins to fill, add more water. In the event that the trap is not very effective in one area, try moving it to another area.