I will be cutting the foliage from mine tomorrow and I plan to spray Banrot and Kphite.
Seedfork: About your question...... it really depends, in your area it may have killed it but I know here (this area) it didn't. It may have lessened it some but as long as there is green on the daylily there is a chance the rust is still there. Rust begins in the inside of the plant and lives in the green of the foliage so if the plant is already infected with rust inside then if there is any green at all left on a plant throughout the winter then rust can survive; it will just need the right conditions to pop up.
