METHOD: Both ELISA and Visual Examination METHOD NARR: Sto accessions were inoculated with PVY and HeMV. There were visual inspections every 7 days with ELISA at the end of weeks 3 and 6. No ELISA data is provided, only susceptimless plants were back-inoculated on indicator plants. RESULTS NARR: Eight of the sto accessions were found to be immune to PVY and 6 to HeMV. Three were immune t both viruses.