First of all, FB is like cancer, the quicker you deal with it the better, be walking and checking every morning, then when you find it, look for the growth rings and be sure to cut back of the growth ring, ahead of them is a waste of time. be looking for the subtle change of color from heathy green to sickly green on shoot tips. Lee Elliott Upstart Nursery, Winchester, Il -------------------------------------------- On Thu, 7/19/18, <[email protected]> wrote:
Subject: apple-crop Digest, Vol 67, Issue 13 To: [email protected] Date: Thursday, July 19, 2018, 7:43 AM Send apple-crop mailing list submissions to [email protected] 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 [email protected] You can reach the person managing the list at [email protected] 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 ([email protected]) 2. Re: What to do when fireblight hits tall spindle (Hugh Thomas) 3. Re: What to do when fireblight hits tall spindle (Kari Peter) ---------------------------------------------------------------------- Message: 1 Date: Thu, 19 Jul 2018 00:24:34 -0400 From: "[email protected]" <[email protected]> To: Apple-crop discussion list <[email protected]> Subject: Re: [apple-crop-2] What to do when fireblight hits tall spindle Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" 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 <[email protected]> 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 > [email protected] > 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: [email protected] 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> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://virtualorchard.net/pipermail/apple-crop/attachments/20180719/ef5347f0/attachment-0001.html> ------------------------------ Message: 2 Date: Wed, 18 Jul 2018 23:14:16 -0600 From: Hugh Thomas <[email protected]> To: Apple-crop discussion list <[email protected]> Subject: Re: [apple-crop-2] What to do when fireblight hits tall spindle Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" 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 l et the smoke drift into your orchard - something a guy told me.... Sent from my iPhone > On Jul 18, 2018, at 10:24 PM, "[email protected]" <[email protected]> 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 <[email protected]> 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 >> [email protected] >> 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: [email protected] > www.wincowgill.com > www.virtualorchard.net/ > http://giselacherry.com/ > http://virtualorchard.net/njfruitfocus/index.html > http://www.appletesters.net > http://nc140.org > Twitter @mrsuncrisp > > _______________________________________________ > apple-crop mailing list > [email protected] > http://virtualorchard.net/mailman/listinfo/apple-crop -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://virtualorchard.net/pipermail/apple-crop/attachments/20180718/78cec3ba/attachment-0001.html> ------------------------------ Message: 3 Date: Thu, 19 Jul 2018 12:43:46 +0000 From: Kari Peter <[email protected]> To: Apple-crop discussion list <[email protected]> Subject: Re: [apple-crop-2] What to do when fireblight hits tall spindle Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8" 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 a bout 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: [email protected]<https://webmail.psu.edu/webmail/shell.cgi?timestamp=1362517824> Twitter: https://twitter.com/drtreefruit From: [email protected] [mailto:[email protected]] 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 l et the smoke drift into your orchard - something a guy told me.... Sent from my iPhone On Jul 18, 2018, at 10:24 PM, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> 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 <[email protected]<mailto:[email protected]>> 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 [email protected]<mailto:[email protected]> 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: [email protected]<mailto:[email protected]> www.wincowgill.com<http://www.wincowgill.com> www.virtualorchard.net/<http://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 [email protected]<mailto:[email protected]> http://virtualorchard.net/mailman/listinfo/apple-crop -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://virtualorchard.net/pipermail/apple-crop/attachments/20180719/c1ef41e8/attachment.html> ------------------------------ _______________________________________________ apple-crop mailing list [email protected] http://virtualorchard.net/mailman/listinfo/apple-crop End of apple-crop Digest, Vol 67, Issue 13 ****************************************** _______________________________________________ apple-crop mailing list [email protected] http://virtualorchard.net/mailman/listinfo/apple-crop
