METHOD: Visual Examination CONDITIONS: Green House METHOD NARR: Accessions were propagated in a GH and tubers were harvested. They were stored at 3-4C until inoculation approximately one month later. Tubers were inoculated wither tuber using a hand-held sprayer. After 1 month, tubers were evaluated for infection by rating sporulation on the tuber surface. Sporulating patches were found and then the number of conidiophore groups per field of view showing very low or no infection in the laboratory trials were exposed to natural inoculum in storage facilities for both processing and table stock storage. RESULTS NARR: There were accessions with consistently high sporulasporulation in both the lab and storage tests. Some accessions had inconsistant results. Significant differences were found among accessions of the same species. AUTHOR EXPLANATION: Fungal sporulation, instead of disease symptoms,reening because of the great variability of periderm color and smoothness among the species, which made differentiation of natural periderm characteristics of the species from silver scurf symptom difficult. In addition,uces similar symptoms. Infection in table stock storage was lower than in processing storage which may be a function of differences in temperature.