Sharon: Ditto on what Sue said. There are different types of rust and they are host specific. Rose Rust will not infect Daylilies for instance, and Daylily rust won't infect roses. They are two different types of rust..... Until the discovery of daylily rust in 2000, there wasn't even an official name for the disease. Since then, Puccinia Hemerocallidis (botanical name for daylily rust ) has only been linked definitively with Patrina as an alternate host plant. At one point they thought it might affect Hostas, but that turned out not to be true. The only other plant I've read about as being possibly susceptible to daylily rust is Alceas (Hollyhocks) and that's still debateable. As for your Dusty Miller, I can find no reference to any type of rust on that plant. It is susceptible to Alternaria leaf spot which can look like rust when the lesions turn rusty colored, but it's not the rust disease that is on daylilies. Glad you found something that works for you though on whatever you have............Maryl
