[Apple-Crop] Pruning cuts

Tue Mar 21 15:31:28 EDT 2017

Apical dominance has to do with leaves and green shoots, not wood. The cambium produces wood (xylem) to the interior and "bark" (phloem) to the exterior. The cork cambium layer, which is outside the phloem, produces the actual flaky and tree-species-distinctive outer bark on the trunk. Having leaves and shoots above the large pruning cut provides carbohydrate for the growth of the callous and eventual xylem and phloem around the large cut surface. Water goes up through the xylem and photosynthate travels down through the phloem. The photosynthate feeds the living tissue around the pruning cut, hastening healing.
Julie
Juliet E. Carroll, PhD
Fruit IPM Coordinator, New York State Integrated Pest Management (IPM) Program
Cornell University, 630 W. North St., Geneva, NY 14456
315-787-2430 (Fax -2360), jec3 at cornell.edu
Cornell Cooperative Extension provides equal program & employment opportunity
Diversity and inclusion are a part of Cornell University’s heritage

-----Original Message-----
From: apple-crop [mailto:apple-crop-bounces at virtualorchard.com] On Behalf Of Arthur Harvey
Sent: Tuesday, March 21, 2017 2:54 PM
To: Apple-Crop discussion list <apple-crop at virtualorchard.com>
Subject: Re: [Apple-Crop] Pruning cuts

Not to doubt the advice regarding  "foliage feeding the cut from above"----but how does that relate to the theory of apical dominance we used to hear about?
--------------------------------------------
On Tue, 3/21/17, David Kollas <kollas at frontier.com> wrote:

 Subject: Re: [Apple-Crop] Pruning cuts
 To: "Apple-Crop discussion list" <apple-crop at virtualorchard.com>
 Date: Tuesday, March 21, 2017, 11:13 AM

 Dean:	I use Doc Farwell’s Seal
 and Heal (green) or the similar Doc Farwell’s Grafting  Seal on cuts thatI think will not  heal over within two or three years if they do not slope enough to shed  rain over theraised lip of new growth.  Wood  rot develops on wounds that provide wet conditions favorable  to decay. Large cuts made  to permit grafting do not heal rapidly if there is no  foliage feeding the cut fromabove. Observe temperature limitations  on the label.
 David KollasKollas OrchardTolland, CT  On Mar 9, 2017, at
 2:47 PM, Dean <dean at berrypatchfarm.com>
 wrote:
 We have
 made some large cuts,
 4-6" seems like some latex paint
 would be helpful (apples). 
 Realize standard advice says no
 But ready for advice.
 Thanks
 77 tues
 forecast 15 tomorrow night in central Iowa. 

 Regards, Dean
 Www.berrypatchfarm.com

 _______________________________________________
 apple-crop mailing
 list
 apple-crop at virtualorchard.com
 http://virtualorchard.com/mailman/listinfo/apple-crop

 -----Inline Attachment Follows-----

 _______________________________________________
 apple-crop mailing list
 apple-crop at virtualorchard.com
 http://virtualorchard.com/mailman/listinfo/apple-crop

_______________________________________________
apple-crop mailing list
apple-crop at virtualorchard.com
http://virtualorchard.com/mailman/listinfo/apple-crop