Disease on crop
fungalOnion White Rot on scallion (bunching onion)
Sclerotium cepivorum
Soil-borne fungal disease specific to alliums. Sclerotia survive 20+ years in soil; once present, the disease persists indefinitely in that bed.
- Disease
- Onion White Rot
- Pathogen type
- Fungal
- Crop
- Scallion (Bunching Onion)
- Scientific name
- Sclerotium cepivorum
Onion White Rot on scallion (bunching onion)
Detailed guidance for this section is being prepared. Check back soon.
Symptoms on scallion (bunching onion)
- ▸ Yellowing and dieback of leaves
- ▸ White fluffy mycelium and small black sclerotia at the base of the bulb
- ▸ Soft rot of bulbs at harvest
- ▸ Bulbs that fall apart when pulled
IPM controls
- ✓ Source certified disease-free seed garlic and onion sets
- ✓ Never plant alliums in known-infested ground (rotation alone won't help due to long sclerotia survival)
- ✓ Soil solarization in summer can reduce inoculum but not eliminate it
- ✓ Garlic powder soil drench triggers premature germination of sclerotia in absence of host (experimental)
- ✓ Raised beds with imported soil for established infestations
Other crops affected by onion white rot
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