Viewing post #1105404 by sooby

It would depend on your budget, how bad the rust is in your garden, and to what extent you want to control it. Some people do nothing, some just want to keep the plants from looking too bad, and for some it is all out war If you use a systemic fungicide you should rotate it with a contact fungicide so that you don't become ground zero for a fungicide resistant version of the rust. The full scale attack requires frequent spraying, maybe every couple of weeks for example. Some people use only a contact fungicide - less effective but low risk of resistance and much less expensive. I'm not sure if you're thinking of getting something now in anticipation, or just thinking ahead. I would wait and see if it happens first. Even UltraDawn dish soap diluted at 1% with water has shown some effectiveness in a scientific study. There's no one single answer to the question......it depends. If you go the fungicide route it should be something labeled and effective specifically for rust diseases, preferably tested for daylily rust.

You may find this article from the AHS Daylily Journal useful, it describes fungicide options and other control tactics:
http://www.daylilies.org/RustR...