Common Scab of Potato
Streptomyces scabies
Potatobacterial
An actinomycete disease of dry, alkaline soils producing rough, corky scab lesions on tuber skin.
Symptoms
Rough, corky, raised or pitted scab lesions on the tuber skin, mainly a cosmetic quality issue.
Favorable conditions
- •Dry soil during tuber set
- •Alkaline soil pH
Management
- 1Maintain a slightly acidic soil pH
- 2Irrigate consistently during tuber set
- 3Plant resistant varieties
- 4Rotate crops
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