Common Scab is a soil-borne disease that primarily affects potatoes and carrots. It is caused by the bacterium Streptomyces scabies, which thrives in dry, alkaline soils. The disease manifests as rough, corky lesions on the surface of the tubers or roots, making them unappealing and sometimes inedible. To prevent Common Scab, it is essential to maintain proper soil moisture and pH levels. Crop rotation and using resistant varieties can also help reduce the incidence of this disease. Regularly monitoring soil conditions and practicing good garden hygiene are effective strategies for managing Common Scab.