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Typical virus symptoms on yam. (A) D. rotundata TDr 99/02674 showing mosaic symptoms; (B) D. rotundata cv. Adaka showing chlorotic leaf discoloration, and (C) mottling; (D) D. rotundata TDr 00/00168 showing leaf deformation ((A–D) source G.R.E. Silva (NRI) [20]); (E) D. rotundata leaf discoloration (Source: Stephen Winter, DSMZ); (F) D. alata showing diffused mottling.
