coronavirus
White Rot in Spring Onion
How to identify and treat white rot in Spring Onion.
potted_plant
Spring Onion care requirements
water
Keep soil consistently moist with 0.5–1 inch per week; avoid waterlogging; reduce water if plants are left to perennialize
soil
Well-draining, fertile loam with pH 6.0–7.0; tolerates a range of soils; add compost for productivity
light
Full sun to part shade, 4–6 hours daily; tolerates light shade, especially in hot climates
symptoms
Symptoms to look for in Spring 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 Spring 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 Spring Onion
There is no effective treatment once plants are infected; remove and destroy affected plants and surrounding soil where practical to limit sclerotia buildup.
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Preventing white rot in Spring 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.