Forgive me if I treat the subject of pruning too cavalierly, but I am scheduled to give a brief lecture on the various theories. One of them is apical dominance, which I am left wondering about---is it still regarded as a valid consideration in pruning?
Another theory was encapsulated by a NH grower, who, when asked by a group of trainees: Mr Elwood, why did you cut off that branch?----he replied: " I was TIRED of looking at it." Not a totally useless pruning principle, but how is a beginner supposed to follow it? So---the Tiresome Branch Theory of pruning. -------------------------------------------- On Tue, 3/21/17, Juliet Evelyn Carroll <j...@cornell.edu> wrote: Subject: RE: [Apple-Crop] Pruning cuts To: "Arthur Harvey" <arthurhar...@yahoo.com>, "Apple-Crop discussion list" <apple-crop@virtualorchard.com> Date: Tuesday, March 21, 2017, 3:31 PM 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), j...@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-boun...@virtualorchard.com] On Behalf Of Arthur Harvey Sent: Tuesday, March 21, 2017 2:54 PM To: Apple-Crop discussion list <apple-crop@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 <kol...@frontier.com> wrote: Subject: Re: [Apple-Crop] Pruning cuts To: "Apple-Crop discussion list" <apple-crop@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 <d...@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@virtualorchard.com http://virtualorchard.com/mailman/listinfo/apple-crop -----Inline Attachment Follows----- _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.com http://virtualorchard.com/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.com http://virtualorchard.com/mailman/listinfo/apple-crop _______________________________________________ apple-crop mailing list apple-crop@virtualorchard.com http://virtualorchard.com/mailman/listinfo/apple-crop
