Interesting conversation. What I gather is that the Japanese species have narrow leaves but are very rust susceptible.
Sue asked, "Do you see a difference in leaf width between foliage habits or ploidy?"
Good question. I have often wondered that myself. Just from a broad sense, it seemed to me that more of my tet seedings exhibited rust susceptibility vs. my dip seedlings. I had a variety of crosses for both. But .... it may be I just happened to have more rust susceptible tet crosses than dip crosses.
Now whether more ev, sev, or dor habits exhibited rust .... I do not know. It would seem likely that dormants would be more likely to rid the plant of rust if they go into a hard dormant stage. But I rarely get freezing temps here. I am in another world living in the deep south compared to most here on this forum.
All I know is that it is very frustrating to see the semi-annual outbreaks of rust among all my daylilies. Fall seems to be the worst season. But this coming year may be a whole different ballgame if I don't get any cold weather this Winter. I am still in the 80's here and it is hot & humid .... and miserable.
