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nafex - [NAFEX] Krymsk-1 Prunus rootstock

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  • From: Jwlehman@aol.com
  • To: nafex@lists.ibiblio.org, nutgrowers@yahoogroups.com
  • Subject: [NAFEX] Krymsk-1 Prunus rootstock
  • Date: Thu, 7 Apr 2011 10:49:48 EDT

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




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