Re: [Apple-Crop] Jonagold

2016-10-12 Thread Kushad, Mosbah M 
I agree that a fruit needs adequate number of leaves to produce sugars that it 
uses to produce the coloring substance (anthyocyanin), among other things... 
However, fruit color will not be any better in an off year when the tree may 
have only a handful of fruits and a large number of leaves.  Mosbah

From: apple-crop [mailto:apple-crop-boun...@virtualorchard.com] On Behalf Of 
Hugh Thomas
Sent: Wednesday, October 12, 2016 2:32 PM
To: kellyorchards; Apple-Crop discussion list
Subject: Re: [Apple-Crop] Jonagold

A heavy crop will do it.  Find a tree with good color and then make an estimate 
of the leaves / fruit ratio. I'm betting the non-coloring trees have 10-40 
leaves or per fruit, whereas the good color trees will have 50-100+ leaves per 
fruit. My take on it..

On Wed, Oct 12, 2016 at 12:19 PM, kellyorchards 
> wrote:
Why are my Jonagolds not coloring?  Can this be an issue if they have a heavy 
crop?



Art Kelly
Kelly Orchards
Acton, Maine

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Re: [Apple-Crop] Jonagold

2016-10-12 Thread Kushad, Mosbah M 
Art:  Many factors contribute to poor color in “Jonagold” and other varieties 
of apples.

1.  “Joangold” is not a high coloring cultivar, except in excellent sites 
where it can get adequate cool nights and warm (but not hot) days at least one 
month before harvest.

2.   “Jonagold” is a vigorous tree. Adequate pruning is a must for good 
color.

3.  Heavily fertilized trees produce poor color fruits.

4.  High temperature and high humidity during coloring will reduce fruit 
color.

5.  I have seen young trees produce good color fruits compare to older 
trees, but I have also seen the opposite, which gets back to tree management..

6.  I am not sure heavy crop load impact fruit color much . I would assume 
the opposite.. A tree that has a heavy crop load is likely to have less shaded 
fruits..

7.  In my opinion the key players are inadequate pruning and hot and humid 
weather before harvest.

8.  I have seen a NW grower mist a “Jonagold” block to increase color 
through evaporative cooling.   Not a good practice if you live in a humid area..
Mosbah Kushad, University of Illinois

From: apple-crop [mailto:apple-crop-boun...@virtualorchard.com] On Behalf Of 
kellyorchards
Sent: Wednesday, October 12, 2016 1:20 PM
To: Apple-Crop
Subject: [Apple-Crop] Jonagold

Why are my Jonagolds not coloring?  Can this be an issue if they have a heavy 
crop?



Art Kelly
Kelly Orchards
Acton, Maine
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[Apple-Crop] Jonagold

2016-10-12 Thread kellyorchards 
Why are my Jonagolds not coloring?  Can this be an issue if they have a heavy 
crop?



Art Kelly
Kelly Orchards
Acton, Maine___
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