We got a bit colder at our site 26(bottom of hill) to 32.5(hilltop) and
we're in late bloom. I'm guessing the trees I shouldn't have planted at the
bottom of the hill are likely smoked. Any thinning suggestions for the
middle of the orchard? Or ways to evaluate fruit set with frost?
Karl
----- Original Message -----
From: "Fleming, William" <[email protected]>
To: "Apple-Crop" <[email protected]>
Sent: Tuesday, May 11, 2010 9:05 AM
Subject: Apple-Crop: RE: Experience with cold temps post bloom
I don't think your temps were cool enough and especially the duration long
enough to cause damage. 28° is the temp for 10% kill post bloom but the
duration needs to be about three hours.
I wouldn't worry one bit. Growing apples in WA state we considered a frost
like yours to be a free thinning of fruit that was likely to drop anyway.
More likely it just speeded the natural drop along.
Sometimes with pears temps in that range can cause marking but with apples
there is little concern.
Bill Fleming
Montana State University
Western Ag Research Center
Corvallis, MT 59828
-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of John Lyman III
Sent: Tuesday, May 11, 2010 7:06 AM
To: 'Apple-Crop'
Subject: Apple-Crop: Experience with cold temps post bloom
Hi,
Had cold temps ranging from 27.5 to 29 in low spots in our orchard this
morning. We are a week to 10 days past PF, and fruit size is on ave 8-12
mm. Does anyone have previous experience with cold temps at this stage that
they could share? Thoughts on approach to thinning, what fruit damage to
expect, etc. I think we were at these temps for just an hour or two.
Thanks,
John Lyman
Lyman Orchards
Middlefield, CT
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