Terrible root stock, M9, and derivities, probably infected root suckers, root died first then the top, Havent had this trouble on Bud 9 but bud 9 makes very smal trees unless it has a vigorous cultivar on top. Much as I hate old M7 it is best for weak growing, FB susectable cultivars, CG 10 not bad but very brittle first few years., Lee Elliott Upstart Nursery, Winchester, Il -------------------------------------------- On Thu, 7/26/18, <apple-crop-requ...@virtualorchard.com> wrote:
Subject: apple-crop Digest, Vol 67, Issue 28 To: apple-crop@virtualorchard.com Date: Thursday, July 26, 2018, 7:50 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: Photos of dying trees-fireblight- Doug - resent and complete (Doug Nelson) ---------------------------------------------------------------------- Message: 1 Date: Mon, 23 Jul 2018 11:36:52 -0500 From: Doug Nelson <doug.nel...@nelsonmultimedia.com> To: Apple-Crop discussion list <apple-crop@virtualorchard.com>, wincowg...@mac.com Subject: Re: [apple-crop-2] Photos of dying trees-fireblight- Doug - resent and complete Message-ID: <CABX=buhoa0+gwbc_kk328g_u4jht6gnje0e+nnfyhr6nagp...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" The row that is most affected is buckeye gala on M9 that is about 4 years old. I removed one of the trees and cut back the bark around the graft union. I found the graft union appeared to be dead with green tissue above and below. The tree went from healthy to fully wilted within about 2 weeks. About 20 trees around it in the same row appear to be doing the same thing. [image: IMG_20180723_092425 (1).jpg] [image: IMG_20180723_090527 (1).jpg] [image: IMG_20180723_090407 (1).jpg] [image: IMG_20180723_092428 (1).jpg] [image: IMG_20180723_092425.jpg] [image: IMG_20180723_090527.jpg] On Sun, Jul 22, 2018 at 9:28 PM wincowg...@centurylink.net < wincowg...@centurylink.net> wrote: > The first response sent too quick by mistake, here is the complete email??? > > Doug-I looked at the photos you attached and the last photo, #22301 (see > below) at the base just above the rootstock- has long vertical cankers > (sunken areas in the bark) and verticle cracking in the bark. Combined > with the tree collapsing it sure appears to be fireblight. Mo Tougas > echoed this question. > > However you also appear to have significant damage to the rootstock just > below the graft union when you blow the picture up. Its weedy and from the > angle cannot see how much is compromised. This can be caused by herbicide, > mechanical injury, winter injury or all the above and could contribute to > tree collapse. > > I had emailed you a list of questions on this list but I didn't get a > response. (See list below from July 18 email.) The purpose was to try and > narrow down whats going on. > You have had much advice, from many on the list. > > The main question is what rootstock is you're planting on? If is a > susceptible stock with a susceptible root then you have double trouble.The > fireblight can run right to the root causing tree collapse. With those > cankers visible in the lower trunk this looks like what you have. > > *My guidance to growers with this combination, susceptible stock with > susceptible root is take the tree(s) out.* > > You also indicated these were in clusters, again sounds like fireblight, > the inoculumn moves to the trees next door and take it out. > > The soil born disease phytophora can cause a similar looking tree > collapse, but will not have the cankers in the trunk. Also is born in the > soil water and usually runs down a row if there is any slope. > > There are many good labs, both Univ. and private that can id both > fireblight and phytophora if the get live tissue samples. You need to > confirm what you have so you can plan control programs. > > I would remove all infected trees and burn, sample for lab first- > > Check trees for FB cankers and remove if you find. > > There are spray programs to harden off fireblight shootblight. Certainly > both shootblight and blossom blight programs should be implemented next > year beginingbeginning with copper sprays very early, Apogee program > beginning at Pink for shoot blight, and blossom blight using Newa or > forecasting programs to predict spray applications of antibiotics and SAR > products until all bloom is gone, and then post bloom control programs. > > See also our fact sheet that covers all these pieces for control: > An Annual Fire Blight Management Program for Apples > > https://ag.umass.edu/fruit/fact-sheets/annual-fire-blight-management-program-for-apples > > If you wish do discuss in detail please contact me. > > Best, > > Win > > 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> > > > On Jul 20, 2018, at 11:16 PM, Doug Nelson < > doug.nel...@nelsonmultimedia.com> wrote: > > 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: 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 >> >> >> >> 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. > _______________________________________________ > 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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