<div dir="ltr">hugh makes me think i dont have fire blight given his description. What I have happening is clusters of trees (about 4 or 5 per cluster in 3 different clusters) across my 6000 tree orchard. When the tree becomes symptomatic all the leaves brown and the entire tree seems to dies withing 5 days- all the leaves become droopy then brown at once. Maybe this is something else happening? Attached are pictures.<div><img src="cid:ii_jjuub9yq0" alt="22297.jpeg" width="562" height="316"><br></div><div><img src="cid:ii_jjuubbh31" alt="22289.jpeg" width="316" height="562"><br></div><div><img src="cid:ii_jjuubd1w2" alt="22291.jpeg" width="316" height="562"><br></div><div><img src="cid:ii_jjuubfht3" alt="22301.jpeg" width="316" height="562"><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Jul 19, 2018 at 7:45 AM Kari Peter <<a href="mailto:kap22@psu.edu">kap22@psu.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Pruning out fire blight this time of year can be tricky depending how much fire blight you are pruning out. Excessive pruning will encourage more shoot growth = more shoot
growth means susceptible shoots to fire blight right now especially with conditions favorable for disease. Trees should be hardened off right now meaning new shoot growth should be finished. When this occurs, the bacteria stops moving in the trees and new
fire blight incidence should stop. I would highly recommend avoiding doing anything that would encourage new shoot growth right now. If it were me, I would just wait until the dormant period to aggressively remove everything. There is much debate about
cleaning pruning shears between cuts. I don’t recommend it because the bacteria can move 3 feet beyond the site of visible infection, so disinfesting is a moot point. Here is my latest article (June 26, 2018) in Penn State Fruit Times about what to do about
fire blight now (it’s just below the info about apple scab):<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="https://extension.psu.edu/mid-season-tree-fruit-disease-update" target="_blank">https://extension.psu.edu/mid-season-tree-fruit-disease-update</a><u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">And a note: do not spray any streptomycin. Streptomycin is for bloom time only, and after a trauma event, such as hail. Do not spray it beyond these times. If you are concerned
about new shoot growth (if this is a new orchard pushing right now), I would recommend Cueva to limit spread of shoot blight.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#7f7f7f">Kari Peter, Ph.D.<br>
Assistant Research Professor - Tree Fruit Pathology<br>
Department of Plant Pathology and Environmental Microbiology<br>
Penn State Fruit Research and Extension Center<br>
290 University Dr., P.O. Box 330<br>
Biglerville, PA 17307-0330<br>
<br>
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#7f7f7f">Office: 717-677-6116 Ext. 223<br>
Fax: 717-677-4112<br>
E-mail: </span><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0070c0"><a href="https://webmail.psu.edu/webmail/shell.cgi?timestamp=1362517824" target="_blank"><span style="color:#0070c0">kap22@psu.edu</span></a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#7f7f7f">Twitter:
</span><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#7f7f7f"><a href="https://twitter.com/drtreefruit" target="_blank">https://twitter.com/drtreefruit</a><u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:apple-crop-bounces@virtualorchard.com" target="_blank">apple-crop-bounces@virtualorchard.com</a> [mailto:<a href="mailto:apple-crop-bounces@virtualorchard.com" target="_blank">apple-crop-bounces@virtualorchard.com</a>]
<b>On Behalf Of </b>Hugh Thomas<br>
<b>Sent:</b> Thursday, July 19, 2018 1:14 AM<br>
<b>To:</b> Apple-crop discussion list<br>
<b>Subject:</b> Re: [apple-crop-2] What to do when fireblight hits tall spindle<u></u><u></u></span></p>
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<p class="MsoNormal">Doug, it's sort of complicated. First, you probably know the bacteria travels from the tip downwards. The idea is to cut well below where the infection has traveled. You can cut away some bark and see where the brown area meets green cambium.
I cut pass this point - well past it. I'm guessing I would cut about three times the length of the affected area. For example, if the tip has died back 6 inches, I would remove 18 inches of that limb. This is my gut but but this has worked for me in the past.
I don't know the extent of your knowledge, but you need to be careful not to spread the bacteria with your tools and hands. Some people dip their tools in alcohol or Clorox between cuts. I use Clorox wipes on my shears, making sure I use a fresh wipe almost
every cut, as the wipe ought to be very wet. On small limbs, say a quarter of an inch or less, I rip the limb off. The big thing is, take action now!! With warm weather you can get a lot of damage. If you burn the limbs, don't let the smoke drift into your
orchard - something a guy told me....<br>
<br>
Sent from my iPhone<u></u><u></u></p>
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On Jul 18, 2018, at 10:24 PM, "<a href="mailto:wincowgill@centurylink.net" target="_blank">wincowgill@centurylink.net</a>" <<a href="mailto:wincowgill@centurylink.net" target="_blank">wincowgill@centurylink.net</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Doug- where are you located?<u></u><u></u></p>
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<p class="MsoNormal">What rootstock(s)?<u></u><u></u></p>
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<p class="MsoNormal">What cultivars?<u></u><u></u></p>
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<p class="MsoNormal">How old are the trees in your tall spindle?<u></u><u></u></p>
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<p class="MsoNormal">What was your fireblight control program at bloom? <u></u><u></u></p>
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<p class="MsoNormal">any post bloom program(s)<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Win<u></u><u></u></p>
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<p class="MsoNormal">On Jul 18, 2018, at 9:26 PM, Doug Nelson <<a href="mailto:Doug.Nelson@nelsonmultimedia.com" target="_blank">Doug.Nelson@nelsonmultimedia.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I appear to have fireblight popping up in my orchard. The ipm group tells me to prune all limbs back to central leader and not to do any spraying. <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">What do you do?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Win Cowgill<u></u><u></u></p>
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<p class="MsoNormal">Apple-Crop Co-Founder<u></u><u></u></p>
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<p class="MsoNormal">Professor Emeritus, Rutgers, the State University<u></u><u></u></p>
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<p class="MsoNormal">Visiting Scholar, UMASS-Amherst<u></u><u></u></p>
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<p class="MsoNormal">CEO- Win Enterprises International, LLC<u></u><u></u></p>
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<p class="MsoNormal">Editor Horticultural News<u></u><u></u></p>
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<p class="MsoNormal">PO Box 143<u></u><u></u></p>
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<p class="MsoNormal">Baptistown, NJ 08803<u></u><u></u></p>
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<p class="MsoNormal">Office 908-489-1476<u></u><u></u></p>
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<p class="MsoNormal">Fax- 908-996-6404<u></u><u></u></p>
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<p class="MsoNormal">Email: <a href="mailto:wincowgill@mac.com" target="_blank">wincowgill@mac.com</a><u></u><u></u></p>
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<p class="MsoNormal"><a href="http://www.wincowgill.com" target="_blank">www.wincowgill.com</a><u></u><u></u></p>
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<div>
<p class="MsoNormal"><a href="http://www.virtualorchard.net/" target="_blank">www.virtualorchard.net/</a><u></u><u></u></p>
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<div>
<p class="MsoNormal"><a href="http://giselacherry.com/" target="_blank">http://giselacherry.com/</a> <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><a href="http://virtualorchard.net/njfruitfocus/index.html" target="_blank">http://virtualorchard.net/njfruitfocus/index.html</a><u></u><u></u></p>
</div>
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<p class="MsoNormal"><a href="http://www.appletesters.net" target="_blank">http://www.appletesters.net</a><u></u><u></u></p>
</div>
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<p class="MsoNormal"><a href="http://nc140.org" target="_blank">http://nc140.org</a><u></u><u></u></p>
</div>
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<p class="MsoNormal">Twitter <a href="https://twitter.com/mrsuncrisp" target="_blank">@<span class="m_6251660247580224360u-linkcomplex-target">mrsuncrisp</span></a><u></u><u></u></p>
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<p class="MsoNormal">_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Doug Nelson<div>President</div><div>Nelson Multimedia Inc.</div></div></div>