Amanda Gevens, potato and vegetable pathologist for the University of Wisconsin-Madison’s Division of Extension, said potatoes are already generating heat heading into harvest through a process called respiration. If weather conditions raise the temperature of the tubers even further, that can make it difficult for farmers to properly cool them down for storage.
“There may not be adequate cooling air available to get control of this heat load,” Gevens said in an email. “Refrigeration is a great option to cool potatoes at harvest, although the system must have the capacity to handle the high heat load and fresh air also must be provided to purge carbon dioxide.”