Daylily Rust (Puccinia hemerocallidis) in the United States

Leaf Rust on Daylily

Daylily rust symptoms

Daylily Rust in the United States

Puccinia hemerocallidis Thuem.

Puccinia hemerocallidis Thuem.

Uredinial/telial host: Daylily (Hemerocallidaceae) 
        and Hosta (Liliaceae)????
Aecial host: Patrinia spp. (Valerianaceae)

Is Hosta a Host?

Theorized Rust Life Cycle

Rust Spread

Systemic Survival and Spread

Rust Survival

Rust Infection

Slide 14

Fungicide Definitions

Fungicide Definitions

Slide 17

Slide 18

Slide 19

Slide 20

Slide 21

Fungicide Recommendations

Rust Control during the Winter

Current Rust Research and Collaborations

Susceptibility of 25 Cultivars