@needrain -- you said something that started me thinking--about drying daylilies. If the affected daylily was treated, rather than repotted, dried.
In box stores they sell "dried" daylilies. Roots with a little bit of crown.
All completely brown. How do they do that? How much drying can one take? After treating leave the daylily alone. Let it dry and when it is time to replant soak with a little hydrogen peroxide water. Trying to make sure there is no reoccurrance of rot. Just a wild thought. Could drying help? Does anyone know about the bagged big box stores bareroot? Many blessings for a fantastic week!