Donald the apple farmer notices his apples have been nibbled on and catches Chip n' Dale in the act. In the ensuing battle, Donald uses a helicopter to spray them (but they have tiny gas masks). And then he brings in the really heavy artillery.
Clarence Nash
as Donald Duck (voice) (uncredited)
Dessie Flynn
as Dale (voice) (uncredited)
James MacDonald
as Chip (voice) (uncredited)