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nafex - Re: [NAFEX] Plum Cracking Index: I would like your input

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  • From: william Eggers <wce1482@yahoo.com>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] Plum Cracking Index: I would like your input
  • Date: Fri, 7 Jan 2011 13:30:42 -0800 (PST)

The only plum I have never had crack is Santa Rosa.

--- On Tue, 1/4/11, plumhillfarm@gmavt.net <plumhillfarm@gmavt.net> wrote:

From: plumhillfarm@gmavt.net <plumhillfarm@gmavt.net>
Subject: [NAFEX] Plum Cracking Index: I would like your input
To: nafex@lists.ibiblio.org
Date: Tuesday, January 4, 2011, 1:34 PM

Plum Cracking

The biggest yield loss I have in my plum orchard is cracking of the fruit. I live in Vermont (near zone 5, plums for 15 yr) and regularly have dry spells followed by very wet weather. I have seen cracking on essentially everything, including peaches ,in really bad conditions, but with a huge variability from cultivar to cultivar.

Since I am continually adding to my orchard, it would be nice to be able to compare cracking between cultivars.

If people could add in thier experiences, we could develop a relative cracking index which would help a large number of people.

Since every year is different, as well as when in the ripening sequence the adverse weather occurs it is hard to make an absolute scale. So I have averaged how often I see significant damage. For example Pembina cracks readily, and only in 1 year so far has it not had >50% of the fruit cracked, where as alderman only has significant losses in really bad years. Some of my results may be due to the variety not being “ready” to split or limited number of years they have fruited so getting a broader field of experiences is important

If anybody has a better idea on how to do this please let me know.



Very High  (>60% crack bad yr)

Pembina   (so productive still get a lot of plums)
Superior "
Plum parfait   (normally 100% loss)

High   (40-60%)

Redheart
Starks Declicious
Au Auburn
La Cresent

Medium  (20-40%)

Toka
Kaga
Graciuos
Kahinta
     Underwood
     South Dakota
Pipestone
Mirabelle De Metz
Mirabelle De Nancy
Peach Plum
GreenGage
Reine De Claude Gage
Jefferson (blue prune)


Low (10-20%)

Ozark Premier
Comet De Kumetz
Methley
Alderman
Purple Heart
Earlty Costello
Obil’naja
Rema
Rose Marie
Formosa
     Sumumo
Shiro
Ozark Premier
Alabaster
Kirkes Blue
Great Yellow
Ouillins Gage

Very Low

Eary Blue
Ny71
Castleton
Early Laxton
Starks blue
     Pp6995
     Fellenburg
     Long John
Stanley
De Montford
Schoolhouse
opal
‘ Ersinger
Empress

Thanks, Eric

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