METHOD: Visual Examination CONDITIONS: Green House - After inoculation, GH was shaded to maintain temp. range of 15-20C, and cool mist was applied. METHOD NARR: Accessions were grown in the GH through a series of 11 experiments.ed out in 2 phases. The first used plants grown from true seed. The second used plants grown from tubers of individual plants that had been selected for resistance during the first phase. The plants were spray inoculated ber transplanting to pots. After inoculation, conditions were maintained conducive to late blight growth. The proportion of total leaf area with symptoms was recorded for each individual plant at 2-day intervals beginning on thulation, for a total of 3-4 readings. RESULTS NARR: Resistance trends are given by species rather than individual accessions. Many species showed at least on individual with resistance. AUTHOR EXPLANATION: The GH evaluations mayt conditions to differentiate realistically between genotypes since 80-100% infection was reached in only 8 days rather than the typical 3-4 weeks. Validation in field trials is still required. Difference between accessiplained by genetic differences, sampling error, genetic drift or experimental error.