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Old 1st May 2008, 02:03 PM   #1 (permalink)
Eric Frei Administrator - Brisbane L5 (Dip) Hort Cert III Arb + some
 
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Default Cockatoo damaged limbs

Cockatoos like to chew off the bark on the tops of branches ... the collar.

In this example there's a "3 way" crotch. It's cockatoo ravaged.

I can never see the cambium growing back so what do you think the long term prognosis is for this union?



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Old 1st May 2008, 02:51 PM   #2 (permalink)
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Default Re: Cockatoo damaged limbs

okay this might sound really stupid but maybe a thin grade of sheet metal like roof flashing held down with small nails cut to fit the gap but not going over the cambium.In theory it should callus over the edges of the meatal and hopefully seal.Maybe in time completely close up.
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Old 1st May 2008, 03:52 PM   #3 (permalink)
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Default Re: Cockatoo damaged limbs

I'm more worried about it from the angle of decay and no further supportive tension wood growth on the upper side to hold the limb up.
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Old 1st May 2008, 04:49 PM   #4 (permalink)
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Default Re: Cockatoo damaged limbs

Maybe head the 3 leaders back to nodes,cable all 3 toghter and thin the canopy to lighten the load.I'd even go as far as to install bolts through the base of the unions.
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Old 1st May 2008, 07:59 PM   #5 (permalink)
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Default Re: Cockatoo damaged limbs

why won't the bark grow back over?
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Old 1st May 2008, 11:07 PM   #6 (permalink)
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Default Re: Cockatoo damaged limbs

Just doesn't, either the cockies come back and keep chewing it or they have taken too large a section like ring barking.
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Old 2nd May 2008, 08:11 PM   #7 (permalink)
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Default Re: Cockatoo damaged limbs

Yep they do some nasty damage. Will have pics next week of a real bad union, also 3 way, with damage.

Tree had already had a failure at another cocky damaged union.
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Old 3rd May 2008, 12:46 AM   #8 (permalink)
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Default Re: Cockatoo damaged limbs

If you have a failure pic Trev I'D LOVE IT THANKS.
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Old 3rd May 2008, 05:33 PM   #9 (permalink)
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Default Re: Cockatoo damaged limbs

doesn't look like any target area shown in photo? with out aerial inspection can't really determine the extent of damage.

i reckon if there is no target area then leave the tree as is and give the cockies what they want. install nesting boxes or hollow logs in the 3 way fork, encourage them to chew on something else upon returning or have habitat ready for them to move into?

worst cases scenario, if you can talk client in to it, annual inspections of damage. i couldn't imagine limb failure caused by that damage for atleast a couply years if not more.

i know that human safety is a priority, however trees and birds have been this sort of thing for a long time, and we should let them continue this behaviour as much as we can.
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Old 3rd May 2008, 08:12 PM   #10 (permalink)
Eric Frei Administrator - Brisbane L5 (Dip) Hort Cert III Arb + some
 
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Default Re: Cockatoo damaged limbs

Development site mate, they're going to build very close to it or under it.

Buildings to last say 50 years+, what about the tree?

Cant cut off the two branches, that's like half the tree. Can reduce and thin etc but what is the long term prognosis?
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Old 4th May 2008, 10:16 PM   #11 (permalink)
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Default Re: Cockatoo damaged limbs

Quote:
Originally Posted by Ekka View Post
Development site mate, they're going to build very close to it or under it.

Buildings to last say 50 years+, what about the tree?

Cant cut off the two branches, that's like half the tree. Can reduce and thin etc but what is the long term prognosis?
how sound is the wood?If its getting rotten or soft i'd just remove it and get it over with.
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Old 6th May 2008, 03:22 AM   #12 (permalink)
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Default Re: Cockatoo damaged limbs

long term, could be managed with lots of money! but is that likely or realistic?
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Old 6th May 2008, 03:45 AM   #13 (permalink)
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Default Re: Cockatoo damaged limbs

Unsuitable for retention due to damage.

Would you retain it if the union was bifurcated with included bark? ie identified fault.

If they are building close to it they will stuff the root system anyway.

They are probably looking for an excuse to remove it anyway

If the limbs are not to big you could "cobra cable" it. not hold the tree together but as a back up if the tree fails.
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