Proven to prevent development of stable and house flies in manure with 97% effectiveness.
(Farnam) Insect growth regulator Diflubenzuron prevents development of flies in manure of treated animals, but does not control adult flies. Begin feeding in early spring and continue through late fall. Safety studies in pregnant or lactating mares, foals and stallions have not been conducted. Feed 1 oz. for thousand pound horse daily.