Richard Klimesh Water traps come in jar or bag form. Fly traps may not smell good to you, but flies love 'em. By using water traps, you can collect millions of flies that would otherwise be bugging you and your horses. Once inside the trap, female flies give off their own sex pheromone that attracts male flies.
Flies follow the odors, fly under the cap and down into the trap.
Instead, they try to fly through the side of the clear plastic or glass, get exhausted, and drown. The mass of decaying flies provides an odor that attracts more female flies. Placement For optimum result, water traps should be located on the ground or hung no higher than 4' because fly scent clings to the earth forming a path that draws flies to the trap. Generally, traps work best if set in the sun, but when the temperature is above 90F flies seek shade to cool off. Place traps in the sun at lower temps and in shade when it's hot.