Abstract: Method and apparatus for treating fruits including use of an air plenum above palletized boxes of fruit to force air through the plenum and to the front of the trailer containing the palletized fruit. The air in very high volume per minute is forced downwardly and drawn through the fruit to provide controlled temperature and humidity. A portion of the exhaust air is recirculated while maintaining high humidity of at least 75% and temperature difference between inlet and exhaust air of no greater than 5.degree. F.