Light gray to Gray fungal growth is generally visible at neck infection and on outer scales. Proper drying and curing of onion essentially prevents this storage disorder. Black discoloration and shriveling at neck and on outer scales caused by the fungus Aspergillus niger. Often associated with bruising and leads to bacterial soft rot. Minimize bruising and other mechanical injuries, sunscald, and freezing injury.
Scales have a watery-cooked appearance.
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