Abstract: Improved apparatus and methods for applying treatment fluids, such as disinfectants, fungicides, flavoring agents, and tenderizing agents, to foodstuffs to, for example, reduce populations of microorganisms or fungi present thereon, or alter the taste or texture thereof. In representative embodiments, the apparatus includes an elongated housing structure, a fluid delivery system, and a shaft having one or more protruding members, the latter being adapted to agitatively convey the foodstuffs from an inlet to an outlet of the housing, as the fluid delivery system delivers a treatment fluid to the foodstuffs. The elongated housing structure forms a plurality of drain-openings therethrough and comprises one or more rider bars. In related embodiments, the present invention is directed to methods for applying such treatment fluids to foodstuffs, where the methods use the disclosed apparatus; and to elongated housing structures such as those of the disclosed apparatus.