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  • From: Steve <sdw12986@aol.com>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] Apple Tree Girdling
  • Date: Fri, 04 Apr 2008 01:14:55 -0400

Jason MacArthur wrote:
Well, the snow is finally melting away from the bases of my apple trees enough that I can see just how terrible the mice were this winter. Some trees are goners without a doubt, but some are 70-90% girdled, and I am wondering if these will have what they need to pull through and grow or should I graft them completely over?
All trees are on Dwarf Rootstock (M9, G16, B9) and are going into 4th or 5th leaf.
Any helpful experience to be shared?

Jason MacArthur
Marlboro, Vt

That scares me a bit. It will be a couple of weeks, at least, until I can see the base of some of my apples. One might be visible now but some are still under more than 2 feet of snow. To make matters worse, this is the first time in about 10 years that I didn't enclose the base of my trees with hardware cloth. Winter came so suddenly this year that I didn't get it done. I hope I don't have to bridge graft any of them this year.

Don't give up, even on the ones that are completely girdled. This happened to my Honeygold tree about 10 years ago (the reason I started using the hardware cloth every winter until this one). I cut some long thin scions as soon as the damage was obvious. Water sprouts would be ideal, if you have any. I dug the soil from around the base (a couple of inches) to get a good view of the bottom of the damage. After it warmed up and the tree was showing signs of growth, I took the scions out of the refrigerator, cut the top and bottom at a slant. I cut little pockets in the bark above and below the mouse damage. I believe I cut a T shape to make the pockets. (Upside down T for the upper ones.) The scions should fit in tight. You want to bow them a bit to fit them into their pockets. The tension of the scion trying to go back to straight keeps them firmly in their place. As I recall, I wrapped masking tape all around the area to seal off the grafts and further keep the scions in place.

For my tree, I placed 3 scions around the trunk. Then nature gave me a gift. Two sprouts came up, on their own, from just below the mouse damage. When those got tall enough to be well past the upper edge of the damage, I cut their (upper) tips off (again slanted to fit flat against the trunk) and tucked them into pockets in the bark also. Those grew extremely well. So now I had 5 grafts, all of which grew and the tree if just fine and quite productive many years later.

For your trees, do 2 or 3 bridge grafts on the ones that are completely girdled. Maybe only one will be needed on the ones that still have good bark on the other side. This depends on the diameter of the trunk. Use you own judgment, it's not rocket science and what ever you do will probably work. Watch for sprouts that you can tuck in too. These are extremely easy because they are firmly attached at the bottom already. Also, they will not dry out since they are actually growing before you tuck them in. Good luck.

Steve (In the Adirondacks of northern NY)







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