Greg, My "gut" tells me grafting tape will not help. I think an open wound will heal better. I suppose the SW side thawed and quickly refroze. Somewhere I have seen adhesive backed insulation that has a peel-off coating. If this were white and had UV protection, strips a few inches wide and a foot or two long could be stuck to the south -southwest side of trees to prevent this from happening. As far as bridge grafting, this is beyond me. Seems like a replant would be cheaper/faster, I don't know. I paint newly planted trees with a cheap 2 gallon hand pump sprayer. 3 or 4 to 1 paint with water, and I can spray 1000 trees in 3-4 hours. I walk the rows on the S.E. side and then the S.W. side. I use the Ace Hardware sprayer on sale for $9.99 (reg 12.99) and just toss the sprayer after the job is done.
Hugh Thomas Stevensville, MT On Sun, Mar 16, 2014 at 9:30 AM, <[email protected]> wrote: > Greg; > > We get the same damage here in Southern California, but from sunburn, not > Southwest Injury. But the damage is the same, dead cambium layer and > sunken bark. Besides robbing vigor from the tree, here it also attracts > borers who take advantage of the tree's inability to sap out the maggot, > and exploit the edges of the injury. The wounds will not heal; they may > eventually be covered by cambium growing from either side, like a pruning > stump is covered over. > > Bridge grafting is easier on shorter injuries like vole and rabbit damage; > the problem with SWI is that the wounds are long and narrow. Cutting the > tree off and letting a latent bud sprout may be a viable option depending > on the damage, but you will have to weigh the loss of productivity against > how long it would take if you just pruned the tree hard and let it try to > heal the SWI. > > Painting trunks white, especially with an airless sprayer, seems way less > trouble than any of this. > > Kevin Hauser > Kuffel Creek Apple Nursery > Riverside, California > Nakifuma, Uganda, East Africa > > On Sun, 16 Mar 2014 10:42:00 -0400, "Peck, Greg" <[email protected]> > wrote: > > Apple-Crop participants, > > > > Like everyone else in the Eastern half of the US, we've had a > particularly > > cold and snowy winter in Virginia. Not surprisingly, I am starting to > hear > > reports about Southwest injury to young trees. While there is a lot of > > information available on how to prevent southwest injury, I have not > been > > able to find much information on how to deal with the trunks after the > > damage has been done. Typically, growers in Virginia have do not paint > > trunks with latex paint, but many will probably reconsider that decision > in > > future years. > > > > Many trees are probably not going to make it, but I'm wondering if > anyone > > has experience trying to save some of the less severely injured trees > with > > bridge-grafts. How about wrapping the bark with grafting tape to try to > get > > the wounds to heal? (I'm guessing that this will have a low success rate > > because the tissue has already dried out.) Depending upon how far into > the > > rootstock the split extends and the age of the tree, we might also try > > cutting off the scion and hoping an advantageous bud breaks dormancy. > > > > Any other suggestions from those who have to deal with Southwest Injury > on > > a more annual basis? > > > > Thanks, > > Greg > > :::::::::::::::::::::::::::::::::::::::::::::::::::: > > Gregory Michael Peck, Ph.D. > > Assistant Professor of Horticulture > > Virginia Tech > > Alson H. Smith, Jr. Agricultural Research and Extension Center > > 595 Laurel Grove Road > > Winchester, VA 22602 USA > > 540/869-2560 ext 19 > > [email protected]<mailto:[email protected]> > > arec.vaes.vt.edu/alson-h-smith > > www.anr.ext.vt.edu/tree-fruit/<http://www.anr.ext.vt.edu/tree-fruit/> > > > blogs.ext.vt.edu/tree-fruit-horticulture< > http://blogs.ext.vt.edu/tree-fruit-horticulture> > > www.facebook.com/VtechPomology<http://www.facebook.com/VtechPomology> > _______________________________________________ > apple-crop mailing list > [email protected] > http://virtualorchard.net/mailman/listinfo/apple-crop >
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