Daylily Rust Information Pages
Daylily Rust in Japan
Pictured below is Puccinia hemerocallidis on Hemerocallis fulva var. longituba growing in Japan. The leaves on the left show the early stage development of dark colored telia (masses of teliospores) around the more familiar orange uredia (masses of urediospores). Urediospores are able to re-infect daylilies directly, but teliospores cannot. Teliospores germinate to produce basidiospores which infect the alternate host, Patrinia, and then complete the next stage of the life cycle. These infections on Patrinia produce aeciospores which return the rust to daylilies.
illustrations below show that on an infected deciduous
daylily the new growth is free of rust after winter. Click thumbnails
©2002-2014. Photographer Y. Ono, images used with permission.