Ornamental Grass-Rust

See:

Oats (Avena sativa) - Crown Rust

Lawn and Turf - Rusts

Cause The ornamental reed grass Calamagrostis 'Karl Foerster' gets rust in the spring in western Oregon. Several rust fungi in the genus Puccinia have been reported on this host including P. coronata (OR and WA - Oat Crown Rust), P. pygmaea (OR) and P. rhamni (WA).