<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Thank you for this, Glen - it is new information to me - I have been twiddling my thumbs waiting for color here, not only on Jonagold, but on all the later varieties - tonight will be the first night of the season in the lower 40’s/upper30’s - hope that we’ll see some color development soon - <div class="">David Doud IN</div><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Oct 13, 2016, at 12:10 AM, Glen Koehler <<a href="mailto:glen.koehler@maine.edu" class="">glen.koehler@maine.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi Art<div class=""> A contributing factor to problems with fruit color this fall has been late arrival of minimum temperatures below 42F, A "rule of thumb" from a Cornell bulletin is that optimum coloring conditions require two days with low temperature below 42F, followed by a day with high temperature over 68F AND over 80% sunlight on that day. </div><div class=""><br class=""></div><div class=""> The Ag-Radar estimate for Sanford 9 miles away from you (far enough that I wish we had closer data site, working on that) shows that the two days below 42F requirement was not met until September 26, and Sept. 27 had a high temperature over 68F. But the requirement for a day with high temperature over 68F AND over 80% sunshine was not met until October 6.</div><div class=""><br class=""></div><div class=""> I don't see this formula as a powerful predictor, esp. since I've seen some good color improvement while checking traps and doing fall scab index over the past few weeks. And even if it was a robust predictor, it wasn't based on Jonagold. Still it gives some numbers to possibly help explain late coloring conditions this fall.</div><div class=""><br class=""></div><div class=""> Easy to suspect the drought as a contributing factor. I'm also wondering if you used ReTain on these Jonagold. If so, do you think that had any effect on coloring?</div><div class=""><br class=""></div><div class="">- Glen</div></div><div class="gmail_extra"><br clear="all" class=""><div class=""><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class="">Glen Koehler<font face="comic sans ms,sans-serif" class=""><br class=""></font><font size="1" class=""><font size="2" class="">University of Maine Cooperative Extension<br class="">Pest Management Office<br class=""></font></font>Voice: Office 207-581-3882, Cell 207-485-0918<br class="">491 College Avenue, Orono, ME 04473</div></div><div class=""><a href="https://extension.umaine.edu/ipm/programs/apple/" target="_blank" class="">UMaine Apple IPM</a></div><div class=""><a href="https://extension.umaine.edu/ipm/ag-radar-apple-sites/" target="_blank" class="">Ag-Radar</a></div></div></div></div></div></div></div></div>
<br class=""><div class="gmail_quote">On Wed, Oct 12, 2016 at 2:19 PM, kellyorchards <span dir="ltr" class=""><<a href="mailto:kellyorchards@gmail.com" target="_blank" class="">kellyorchards@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=""><div class="">Why are my Jonagolds not coloring? Can this be an issue if they have a heavy crop?</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div style="font-size:100%" class="">Art Kelly<br class="">Kelly Orchards<br class="">Acton, Maine</div></div></div><br class="">______________________________<wbr class="">_________________<br class="">
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