North American Fruit Explorers mailing list at ibiblio

[Jwlehman@aol.com]

In a message dated 4/7/2011 7:20:14 AM Eastern Daylight Time, 
sam.brungardt@state.mn.us writes:

> I have some trees on Krymsk 1 that are about five years old.  It has been 
> doing fine but I would say more than 50% dwarfing if anything - it is a 
> serious size reducer and its been hard for me to adapt to since I am not 
> used 
> to so much dwarfing in stone fruits.  I have only used it on apricots and 
> plums.
> 
> Scott

The experience with VVA-1 and dwarfing varies from species to species 
grafted to it. Even variety to variety. Reports I see seem to indicate it is 
more 
dwarfing for plums and apricots than peaches. Received a call this morning 
from a very knowledgeable grower and NAFEX member that reported on some 
peaches it are only about 80% dwarfing.

I would expect soils to make a difference also. 

The current issue of "Journal of the American Pomological Society"  Has a 
report of the NC-140 Peach rootstock trials. The NC-140 trails is a joint 
University researcn project using 17 sites and over 10 rootstock varieties 
including Krymsk 1 & 2. Peaches used were: Redtop, Cresthaven and Redhaven. 
The 
published results are from 2002 to 2006. 

I'm extracting two sentences from the report. 

" Two of the rootstocks, Pumiselect and Krymsk-2 exhibited many problems 
with survival, computability, suckering and fruit size"    

"Krymsk-1 shows a tendency to have slightly higher cropping efficiency than 
the other rootstocks." 

My summation, all things considered, peaches on Krymsk-1 did very well. 
This limited number of liners is made available to NAFEX and INGA members for 
back yard growers to test.  

Jerry