METHOD: Both ELISA and Visual Examination METHOD NARR: Seven plants of 15 accessions each of sto and dms were mechanically inoculated with PVYntn. Plants were symptomatologically checked every 7 days and ELISA performed after 5 worbance of the 7 replicates was recorded. ELISA was considered positive if absorbance values exceeded twice that of the healthy control samples. Back-inoculation was also used. RESULTS NARR: Ten of the 15 sto accessions immune. Of the 15 dms accessions none were found to be resistant. AUTHOR EXPLANATION: Sources of resistance are discussed.