North American Fruit Explorers mailing list at ibiblio

[Steven Covacci <filtertitle@aol.com>]

Group:


I recently saw an example of an old sweet cherry (P. avium) that outgrew its 
rootsock (Mazzard? or some other type) at The Lehman orchard; the cherry tree 
is now on the decline.


1. Do you suspect that Prunus spp. (apricots, plums, and cherries) grafted 
upon 'KRYMSK 1' rootstock would, in time, out-grow their rootstocks: that 
they scion/variety would have a much thinker trunk then the rootstock and die 
in a few decades?  I suppose this is too new a rootstock to tell for sure.


2. To save a tree from dying should the above describe situation actually 
begin to occur, could you burry the graft union of a mature grafted tree to 
save it, that the scion wood root?


3. Is there much point to P. x domestica (European plum) being grafted on a 
special dwarfing rootstock, since they are already by nature (and through 
their productivity) naturally semi-dwarf?


4. Which is better: apricot on Krymsk 1 or on Manchurian apricot seedling but 
pruned - for the long-term of the tree?


Thanks,
Steve, NJ 6b/7a