Sclerotinia Stem Rot of Potato
Sclerotinia sclerotiorum
Potatofungal
A fungal stem rot producing cottony white mold and hard black sclerotia.
Symptoms
White, cottony fungal growth and black sclerotia on stems, with wilting above the infected point.
Favorable conditions
- •Dense canopy limiting airflow
- •Cool, humid weather during bloom
Management
- 1Rotate with non-host crops
- 2Improve airflow through spacing
- 3Apply fungicide sprays during bloom
- 4Avoid excess nitrogen
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