potted_plant
Onion care requirements
water
Regularly until bulbs begin to swell, then reduce.
soil
Well-draining, fertile soil.
light
Full sun.
symptoms
Symptoms to look for in Onion
- fiber_manual_recordSoft, grey-brown rot starting at the neck of bulbs, especially onions
- fiber_manual_recordGrey fuzzy mold growth around the neck in storage
- fiber_manual_recordBlack sclerotia (hard resting bodies) forming between scales
help
Common causes in Onion
Caused by Botrytis allii, which typically infects through leaf dieback at the neck late in the growing season and develops further during storage, especially where bulbs are stored in humid or poorly ventilated conditions.
healing
How to treat neck rot in Onion
Discard infected bulbs promptly, and ensure remaining bulbs are cured thoroughly and stored in a cool, dry, well-ventilated place to slow further spread.
shield
Preventing neck rot in Onion
Avoid excess nitrogen fertilizer, let foliage die down naturally before harvest, cure bulbs fully in dry conditions, and rotate crops each season.