This paper contains: (1) a report of a preliminary trial of the bait-pail method of control under orchard conditions; (2) the answers to certain questions concerning the feeding of females which are of importance to the problem; (3) a consideration of the best type of pail to maintain maximum catch and minimum evaporation; (4) a summary of numerous baits of the fermenting and non-fermenting types; and (5) a detailed study of the fermenting process in baits with special reference to their attractiveness to the oriental fruit moth, Laspeyresia molesta Busck.