Abstract
A total of 315 ryegrass (Lolium multiflorum, L. perenne) plant introductions [PI] representing 41 countries were tested for resistance to P. grisea. Symptoms ranged from no apparent leaf lesions to plant death. PI 231592, 231602, 287849, 287852, 298091, 303015, 303026, and 306692 were asymptomatic following double inoculations with P. grisea. Plant death was not correlated with number of leaf lesions.

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