
Potato is a vegetatively propagated crop and ranks fourth in production after wheat, rice and corn. Potato is a host to many fungal and viral diseases. More than three dozen plant viruses, a viroid and phytoplasmas can infect potato crop. Viruses known to infect potato in India include PVX, PVS, PVA, PVM, PVY, Potato leaf roll virus (PLRV), Tomato leaf curl New Delhi virus (ToLCNDV), Potato spindle tuber viroid (PSTVd) and Groundnut bud necrosis virus (GBNV. PVX, PVS, PVA, PVM and PVY occur commonly. Present review article describes various techniques for identification and detection of these viruses and viroids.