gnkeynes
Newly Registered
Posts: 1
Joined: Sat Dec 15, 2007 9:47 pm
Location: Mt Lofty Ranges - SA.

Ring barked pear trees

I have a 50 tree avenue of Bradfored Pears, currently standing about 3 metres high. I run sheep on the farm. About 4 months ago, (during our winter) sheep started to nibble away at the bark, and have almost ringbarked some 15 trees. As they came into leaf, they seems to be OK, but now that we are into high summer, those trees are starting to show sign of high stress.(appear to be turning to autumn colours). Initially I wrapped wet newspaper around the effected areas, and bound it on with garden tape.

Does anyone have any better suggestion as to how I can save these trees?

Hoping someone can assist.

:(

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Gnome
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Posts: 5122
Joined: Wed Jul 05, 2006 4:17 am
Location: Western PA USDA Zone 6A

gnkeynes,

Hi and welcome. First read this:
[url]https://www.afn.org/~bonsai/airlayer.html[/url]
This gives you some background on what is going on and why the trees have survived as long as they have in their damaged condition. In short, the roots are still supporting the upper portion of the tree but the products of photosynthesis are not able to return to the roots. Obviously this cannot last.

Now read this:
[url]https://www.ces.ncsu.edu/depts/hort/hil/grafting.html[/url]
Refer to the section entitled "bridge grafting". Sorry I cannot offer any first-hand experience with this technique

With air layering (first link) the layer site can sometimes attempt to bridge the gap between the upper and lower section of bark, this is a disadvantage when layering. In your situation the constantly moist sphagnum moss may aid in the natural healing of the bark. If not then it still may help to maintain the viability to the neighboring tissue until a bridge graft can be performed next spring.

Norm

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