Thu. Sep 19th, 2019

Agritours

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Storage of harvested onions

1 min read

Onions should be mature and dry when harvested. Unless crops are to be cured in the field, harvesting of dry onions usually starts when 60-80% of the tops have fallen over.

Curing onions
Curing onions
Curing onions in the field under straw
Curing onions in the field under straw
drying onions in the field
Drying onions in the field

Formation of chlorophyll – green scales – in the outer skin can occur when crops are left to cure for too long or when bulb shoulders are exposed to sunlight in the field.

Onion storageBulbs need to be carefully handled to minimize bruising and cuts that can allow disease to enter.

Controlled atmosphere storage is increasingly practiced to maintain quality in store over longer periods and extend the marketing period. Also read: professional seedlings raisers

Maintaining CO2 levels at 5% inhibits fungal sporulation and O2 at 3% reduces sprouting.

Temperatures should be around 34°F to help reduce respiration and relative humidity kept at 65-70% in order to inhibit fungal spread.

Source: http://www.yara.us

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