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Neck Rot
(fungus - Botrytis allii, Botrytis sp.): This disease is frequently not noticed in the field because damage usually occurs during transit and storage. Diseased tissue at the base of the crown becomes sunken and watersoaked in appearance. A gray fungal growth later forms on the surface [Picture], which can be followed by other fungi and bacteria, causing decay. Small, black-resting bodies (sclerotia) can sometimes be found on scales [Picture]. Careful handling of the crop at harvest and prompt drying of onions with heat and air ventilation are the best means of controlling this disease.

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