Wear cheap plastic throw away gloves and break the infected limbs with your hands, no need to disinfect tools, just change gloves, much faster. -------------------------------------------- On Sun, 7/22/18, <apple-crop-requ...@virtualorchard.com> wrote:
Subject: apple-crop Digest, Vol 67, Issue 18 To: apple-crop@virtualorchard.com Date: Sunday, July 22, 2018, 9:33 AM Send apple-crop mailing list submissions to apple-crop@virtualorchard.com To subscribe or unsubscribe via the World Wide Web, visit http://virtualorchard.net/mailman/listinfo/apple-crop or, via email, send a message with subject or body 'help' to apple-crop-requ...@virtualorchard.com You can reach the person managing the list at apple-crop-ow...@virtualorchard.com When replying, please edit your Subject line so it is more specific than "Re: Contents of apple-crop digest..." Today's Topics: 1. Re: What to do when fireblight hits tall spindle (Doug Nelson) ---------------------------------------------------------------------- Message: 1 Date: Fri, 20 Jul 2018 22:16:19 -0500 From: Doug Nelson <doug.nel...@nelsonmultimedia.com> To: Apple-Crop discussion list <apple-crop@virtualorchard.com>, ka...@psu.edu, hughthoma...@gmail.com, wincowg...@centurylink.net Subject: Re: [apple-crop-2] What to do when fireblight hits tall spindle Message-ID: <CABX=buje_axwn6xktbssh42ox9ffomtkrvwtqizw_jdk11h...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" 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. [image: 22297.jpeg] [image: 22289.jpeg] [image: 22291.jpeg] [image: 22301.jpeg] On Thu, Jul 19, 2018 at 7:45 AM Kari Peter <ka...@psu.edu> wrote: > 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): > > > > https://extension.psu.edu/mid-season-tree-fruit-disease-update > > > > 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. > > > > Kari Peter, Ph.D. > Assistant Research Professor - Tree Fruit Pathology > Department of Plant Pathology and Environmental Microbiology > Penn State Fruit Research and Extension Center > 290 University Dr., P.O. Box 330 > Biglerville, PA 17307-0330 > > Office: 717-677-6116 Ext. 223 > Fax: 717-677-4112 > E-mail: ka...@psu.edu > <https://webmail.psu.edu/webmail/shell.cgi?timestamp=1362517824> > > Twitter: https://twitter.com/drtreefruit > > > > > > > > > > *From:* apple-crop-boun...@virtualorchard.com [mailto: > apple-crop-boun...@virtualorchard.com] *On Behalf Of *Hugh Thomas > *Sent:* Thursday, July 19, 2018 1:14 AM > *To:* Apple-crop discussion list > *Subject:* Re: [apple-crop-2] What to do when fireblight hits tall spindle > > > > 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.... > > Sent from my iPhone > > > On Jul 18, 2018, at 10:24 PM, "wincowg...@centurylink.net" < > wincowg...@centurylink.net> wrote: > > Doug- where are you located? > > What rootstock(s)? > > What cultivars? > > How old are the trees in your tall spindle? > > What was your fireblight control program at bloom? > > any post bloom program(s) > > > > Win > > > > On Jul 18, 2018, at 9:26 PM, Doug Nelson <doug.nel...@nelsonmultimedia.com> > wrote: > > > > 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. > > > > What do you do? > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.com > http://virtualorchard.net/mailman/listinfo/apple-crop > > > > Win Cowgill > > Apple-Crop Co-Founder > > Professor Emeritus, Rutgers, the State University > > Visiting Scholar, UMASS-Amherst > > CEO- Win Enterprises International, LLC > > Editor Horticultural News > > PO Box 143 > > Baptistown, NJ 08803 > > Office 908-489-1476 > > Fax- 908-996-6404 > > Email: wincowg...@mac.com > > www.wincowgill.com > > www.virtualorchard.net/ > > http://giselacherry.com/ > > http://virtualorchard.net/njfruitfocus/index.html > > http://www.appletesters.net > > http://nc140.org > > Twitter @mrsuncrisp <https://twitter.com/mrsuncrisp> > > > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.com > http://virtualorchard.net/mailman/listinfo/apple-crop > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.com > http://virtualorchard.net/mailman/listinfo/apple-crop > -- Doug Nelson President Nelson Multimedia Inc. -------------- next part -------------- An HTML attachment was scrubbed... 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