Thank you, Glen.
It is undoubtedly the case that we have more than one strain of rust, and that a daylily may be resistant to one strain, but not another.
That is no excuse, imo, for at least not trying to do something beneficial in terms of hybridizing. You may not want to bother to search out resistant parents, but you can at least cull susceptible seedlings. Better yet, stop using known badly susceptible daylilies as parents.
