What Is Rust on Day Lilies?

The appearance of "rust" on daylilies is due to a fungal disease caused by Puccinia hemerocallidis. The leaves produce yellow-brown streaks with the underside of the leaf having yellow spore filled pustules.

Keywords: daylily rust, fungal disease in flowers, daylily disease

About this Author

Jennifer Loucks has been writing since 1998. She previously worked as a technical writer for a software development company, creating software documentation, help documents and training curriculum. She now writes hobby-based articles on cooking, gardening, sewing and running. Loucks also trains for full marathons, half-marathons and shorter distance running. She holds a Bachelor of Science in animal science and business from University of Wisconsin-River Falls.