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White Rot in Allium Hollandicum
How to identify and treat white rot in Allium Hollandicum.
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Allium Hollandicum care requirements
water
Moderate during growing season; drought-tolerant once established. Reduce watering after flowering. Ensure well-draining soil to prevent waterlogging
soil
Well-draining, sandy or loamy soil with neutral to slightly alkaline pH. Tolerates poor soil conditions
light
Full sun (6+ hours daily) for best flowering and foliage development
symptoms
Symptoms to look for in Allium Hollandicum
- 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
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Common causes in Allium Hollandicum
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 Allium Hollandicum
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 Allium Hollandicum
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.