Show New Disease of Sweet Potatoes in the South SouthA A new new and distinctive disease of sweet potatoes known as internal cork has been the subject of intensive intensive intensive in in- studies by Dr C. C J. J Nusbaum Nusbaum Nus- Nus baum South Carolina experiment station Sweet potatoes affected with the disease are characterized by the occurrence of dark brown corky spots of irregular shape and size size There are indications that it may be possible to develop resistant resistant resistant tant strains The disease is caused by a virus but little else is known about it |