Brian : Fruit shape and color are affected by growing climate/region.. Red
Delicious fruits grown in warmer climate are likely to be round or flat while
those in northern regions tend to be oblong (so called type or is it typy like
shiny). I recall from memory that an extension publication showed that apples
from North Carolina were more round and flat while those from either NY or
Washington? were oblong. This is likely to be regulated by hormones since you
can make fruits more oblong shape with Promalin (GA4 +GA7 + 6-BA). Skin
finish is also affected by humidity and temperature. High humidity and high
temperature tend to make fruit color more dull while low humidity and cooler
daytime temperature tend to make fruit color more shiny with smoother finish.
Mosbah Kushad, University of Illinois
From: apple-crop [mailto:apple-crop-boun...@virtualorchard.com] On Behalf Of
Brian Alan Caldwell
Sent: Friday, October 06, 2017 7:34 AM
To: Apple-Crop discussion list <email@example.com>
Subject: [Apple-Crop] satiny vs papery skin
I have two orchard locations, one in a valley and a nearby one on a hilltop.
I'm mystified by a "dry skin" quality in the valley farm.
I graded Liberty apples last night and the differences between the two sites
were dramatic. Hilltop-smooth, satiny finish; dark color; long "red delicious"
shape. Valley-shiny finish; bright color; spherical shape. Jonagolds and
Idareds from the valley have an almost papery skin; much smoother/waxier from
I've seen this in past years too...
Any ideas as to what is going on?
Hemlock Grove Farm
West Danby, NY
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