Reaction of Tall Fescue Infected and Noninfected byAcremonium coenophialumtoPuccinia graminissubsp.graminicola

Seedlings of the tall fescue cultivar Kentucky 31 infected or not infected by the endophyte Acremonium coenophialum were evaluated for reaction to Puccinia graminis subsp. graminicola in the greenhouse. Seedlings (11 wk old) were rated for rust infection type (O-4 scale) 2 wk after inoculation with urediniospores. Seedlings rated 0 or 1 were considered resistant and those rated >1, susceptible; 27% of the infected and 19% of the noninfected seedlings were resistant