"Neck rot is a
disease of onions caused by a fungus called Botrytis" It can be
prevented before harvest so you ensure you won't see it creep in while storing
your onions.
So when do you pull your
onions out of the ground?!
"Onions should be
harvested when the tops of about half the plants in the garden or field have
fallen over. This is a sign that the onions are mature and need to be pulled
out of the ground, keeping the foliage attached. (If you wait too long, the
bulbs may sunburn without the foliage to protect them. )
The next, and most
important step, is to allow the foliage to dry completely before removing it
from the bulb. If green foliage is cut from the bulb and the bulbs are not
dried, a soft rot such as Botrytis can easily set in soon after storing."
-Utah State Extension Small Fruits and Vegetable IPM Advisory
Leave the onions out to
dry in a shady place. Once you are sure the tops of the onions are dry, remove
them and store in the onions in a cool, dry spot. Avoid plastic bags or bowls;
they don't get enough air circulation in either option.
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