Abstract

Detection of potato viruses in plants derived from tissue culture is sometimes difficult using ELISA when virus titers are low. Because of this, SSEM and ELISA were compared for the assay of dilution series of sap from potato plants known to be infected with PVX, PVS and potato leafroll virus. SSEM detected PVX, PVS and PLRV at 10, 10 and 100 times greater dilutions respectively than ELISA. SSEM was an effective method to check on or confirm ELISA questionable results.

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