Evaluation location: , United States
During the growing season of 1969, 1,324 Plant Introduction entries of peas were evaluated in the field for resistance to Race 5. Each entry was planted in two replications of twenty seeds each. Darkskin Perfection and New Era variety peas were used as the standard check varieties to determine the uniformity of disease within the nursery. Each of the check varieties were planted in 120 locations within each replication in the nursery. Each of the check varieties were arranged systematically within the nursery to guarantee uniform placement of these varieties.
The entries were rated as susceptible, tolerant, segregating for resistance, or resistant. The susceptible rating indicates that all plants within the entry were killed prior to bloom. Moderately susceptible (Tolerant)-varieties survived to the bloom stage and in, most instances did not produce seed. Segregating for resistance-varieties in which some seedlings survived and produced seed with no visible symptoms. Resistance ? all seedlings survived and produced seed.