A combine (10) harvester includes a dust suppressor arrangement including an air duct arrangement (140) which is coupled between an enclosed zone (54), extending rearwardly from the discharge end of the feederhouse (20) and above a transverse crop conveying arrangement, and a cleaner fan arrangement (68) so that the fan arrangement (68) draws dust-laden air from the zone (54) and discharges it into the chaffer and sieve arrangement of the crop cleaning arrangement (28).
