Date of this Version
Four years ago we started out with the premise that we could cause morta¬lity in blackbirds with detergents. The first system used was a stand pipe where wetting agents mixed with water were pumped to aerial sprayers. Birds were then driven through the spray curtain. During two years of operation with three or four tests few successes were encountered, for it was difficult to get birds to go through a curtain of spray in any numbers. At the same time people in the research division were using large airplanes in making applications and they were having some success using airplanes with water and detergents in affecting birds.