Rick, do you know if are they a mix of clones and strains or are they all clones? (those in Arneson Park). It would be interesting to note the clones of the earliest cultivars with the longest survivability thru time (indicating a high degree of desease and virus resistance). In other words: if a hybrid from the early 1960's is still being cloned today, it must be pretty darn desease resistant!
I guess if one clones often enough it might be possible to outrun or stay ahead of deseases and viruses; so I've heard anyway. But, I would think that even with so many several successive scalings thru time, even those clones would become virused somewhere along the way.
