Cass asked: "What does this mean, "associated with their long existence?" ".

I have the actual paper, but it does not say anymore about this. I "guess"
that one or both of the following may be what they mean (the translations
that foreigh papers go through often leads to problems of this type): 1)
that the minatures were allowed to keep their flowers (i.e. they were not
pruned) so there were many opportunities for virused pollen contamination by
bees; or 2) the minatures tested were old plants that had many years
exposure to the 1 or 2 % transmission rate.

Explanation 2 was given by a European member of one of the forums as an
explanation for the high virus percentage found in old Europen rose gardens.


--
Henry Kuska, retired

http://home.neo.rr.com/kuska/