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_recordYellowing and wilting of foliage, especially on onions and garlic
- fiber_manual_recordFluffy white fungal growth around the base and roots
- fiber_manual_recordSmall black sclerotia embedded in the white growth and rotted bulb tissue
help
Common causes in Onion
Caused by the soil-borne fungus Sclerotium cepivorum, which can persist as sclerotia in soil for many years and is triggered into growth by chemical signals from allium roots.
healing
How to treat white rot in Onion
There is no effective treatment once plants are infected; remove and destroy affected plants and surrounding soil where practical to limit sclerotia buildup.
shield
Preventing white rot in Onion
Avoid growing alliums in known infected ground for as long as possible, use certified clean sets or seed, and avoid moving contaminated soil between growing areas.