An agricultural harvesting head comprises a frame, crop dividers located at each end of the frame, and a reel supported on the frame between the crop dividers wherein a disk at at least one end of the reel has a wiper mounted upon it that wipes against the surface of a crop divider as the reel and disc rotate during harvesting, and in this manner helps clear the crop divider of crop plants that might otherwise become hair pinned on the crop divider. Wipers can be provided on discs at both ends of the reel to thereby keep both crop dividers clear.