Onion neck rot

This fungal disease develops during storage, and can cause severe losses of onion and shallot bulbs. Prevention of neck rot depends on the use of appropriate cultural techniques, particularly in relation to conditions at harvest and during storage.

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Onion neck rot

Quick facts

Common name Onion neck rot
Scientific name Botrytis allii
Plants affected Onions and shallots (occasionally garlic)
Main symptoms Decay of bulbs from the neck downwards, with copious grey mould and hard, black resting bodies
Caused by Fungus
Timing Symptoms appear during storage. Infection occurs during growth and harvesting of the crop

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