Evaluation location: Michigan, United States
164 S. demissum accessions were obtained from the US Potato Genebank and used in the late blight trial. They were transplanted to the field, and treated with a foliar inoculation of P. infestans US-23 genotype. Percent foliar infection of the plots were recorded at six dates, up to 50 days post inoculation. The percent foliar LB infection was used to calculate the RAUDPC. 148 accessions had no observed LB infection and would be considered LB resistant; 6 accessions had minor, late-season LB and would be considered to have reduced susceptibility to LB; and 5 accessions had moderate to significant LB infection and would be considered susceptible to LB. 5 accessions had No Data.