The World's Most Unusual Bonsai Procedure
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Ka Pabling
Joao Santos
Kev Bailey
Joe Hatfield
Paul Landis
Jay Wilson
Rob Kempinski
11 posters
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The World's Most Unusual Bonsai Procedure
This is to be one of the most unusual procedures I have done and have ever heard of.
Back in November I was checking out one of my Florida Elm bonsai and to my chagrin noticed that several of the branches on the top of the tree were hollowed out. Some type of insect, probably a termite, ate the inside hardwood of nearly half of the branches on the tree. With no deadwood the branches, while still having cambium, were weak and a few broke off quite easily.
The first thing I did was chase the hollows with copper wire. I managed to pull out the remains of the worm/insect with one of them. (Sorry no photo of the body.) But it was rather white. I guess hanging out inside the tree doesn't give it much chance to get a nice Florida suntan.
Next I used a dental irrigator to throughly flush the holes with insecticide. Liquid was leaking from everywhere. Further inspection revealed that the likely entry path was from the bottom of the tree hence making me think it was a termite.
The branches were weak so I pondered what to do about them. I could have chopped off all the branches and attempted to regrow them however I decided to create a deadwood surrogate using polyurethane glue and a copper wire armature.
Polyurethane glue, goes by the brand name, Gorilla Glue, in the US is rather viscous and it expands as it sets. It also likes the mating surfaces to be a bit damp.
I drilled holes on the upper surfaces of the hollow branches and force fed the glue into the holes. Sure enough it flowed into the cavities and then expanded into a foam-like structure. I drilled at least one entry hole and exit hole on the hollow branch sometimes more holes than that. Then squeezing the glue and pushing it with a wire I managed to clean out the termite poop and replace it with glue. I then left the wire in the hole for extra strength.
Once dry I removed the excess glue with a carving knife. The branches are stiffer but not as strong as before. However if they can last long enough to grow some new wood the technique might work.
As you can see I lost about 25 % of the branches on the apex.
Use rubber gloves as the polyurethane glue makes a mess and requires acetone to clean off.
Strange I know and I didn't even try to explain to my wife what I was doing.
Back in November I was checking out one of my Florida Elm bonsai and to my chagrin noticed that several of the branches on the top of the tree were hollowed out. Some type of insect, probably a termite, ate the inside hardwood of nearly half of the branches on the tree. With no deadwood the branches, while still having cambium, were weak and a few broke off quite easily.
The first thing I did was chase the hollows with copper wire. I managed to pull out the remains of the worm/insect with one of them. (Sorry no photo of the body.) But it was rather white. I guess hanging out inside the tree doesn't give it much chance to get a nice Florida suntan.
Next I used a dental irrigator to throughly flush the holes with insecticide. Liquid was leaking from everywhere. Further inspection revealed that the likely entry path was from the bottom of the tree hence making me think it was a termite.
The branches were weak so I pondered what to do about them. I could have chopped off all the branches and attempted to regrow them however I decided to create a deadwood surrogate using polyurethane glue and a copper wire armature.
Polyurethane glue, goes by the brand name, Gorilla Glue, in the US is rather viscous and it expands as it sets. It also likes the mating surfaces to be a bit damp.
I drilled holes on the upper surfaces of the hollow branches and force fed the glue into the holes. Sure enough it flowed into the cavities and then expanded into a foam-like structure. I drilled at least one entry hole and exit hole on the hollow branch sometimes more holes than that. Then squeezing the glue and pushing it with a wire I managed to clean out the termite poop and replace it with glue. I then left the wire in the hole for extra strength.
Once dry I removed the excess glue with a carving knife. The branches are stiffer but not as strong as before. However if they can last long enough to grow some new wood the technique might work.
As you can see I lost about 25 % of the branches on the apex.
Use rubber gloves as the polyurethane glue makes a mess and requires acetone to clean off.
Strange I know and I didn't even try to explain to my wife what I was doing.
Last edited by Rob Kempinski on Thu Feb 04, 2010 2:16 pm; edited 1 time in total
Rob Kempinski- Member
Re: The World's Most Unusual Bonsai Procedure
Strange and interesting story, Rob.
I like your idea for repair. I'll be checking my elms tomorrow.
I like your idea for repair. I'll be checking my elms tomorrow.
Jay Wilson- Member
Re: The World's Most Unusual Bonsai Procedure
Great idea to use the poly glue and wire. I have a similar situation on an apple from a borer. I may try this method to fill a narrow hollow running up the trunk. Thanks Rob!!
Paul Landis- Member
Re: The World's Most Unusual Bonsai Procedure
Never heard of anything like this. How did you come up with it? Seems like it would work:)
Joe Hatfield- Member
Re: The World's Most Unusual Bonsai Procedure
I always thought it was Gorilla glue, but for undercover operations, this may be better!
Boy, am I glad we don't have termites over here. Great repair technique Rob.
Boy, am I glad we don't have termites over here. Great repair technique Rob.
Kev Bailey- Admin
Re: The World's Most Unusual Bonsai Procedure
Hi Rob,
Well done, keeps us updated with the results.
João Santos
Well done, keeps us updated with the results.
João Santos
Joao Santos- Member
Re: The World's Most Unusual Bonsai Procedure
Kev Bailey wrote:I always thought it was Gorilla glue, but for undercover operations, this may be better!
Boy, am I glad we don't have termites over here. Great repair technique Rob.
My bad - hairy monkey it is, not the freedom fighter.
I am not sure what type of bug it was, but since it only ate the hardwood I suspect termite. Lots of them in Florida - hence why my house is made of concrete block.
Last edited by Rob Kempinski on Thu Feb 04, 2010 6:01 pm; edited 1 time in total
Rob Kempinski- Member
The World's Most Unusual Bonsai Procedure
Hi Rob
Termites are usualy more inteligent workers than the insects that attacked your tree. they eat the inner portion of the tree and leave a very thin portion of the bark so you will not know that they are there. they dont bore holes as seen in the pics. anyway whatever kind of insect(,probably stem borers) you did a magnificent job,leaving the wire in the hole to reinforce the trunk/branch is a good idea.
Termites are usualy more inteligent workers than the insects that attacked your tree. they eat the inner portion of the tree and leave a very thin portion of the bark so you will not know that they are there. they dont bore holes as seen in the pics. anyway whatever kind of insect(,probably stem borers) you did a magnificent job,leaving the wire in the hole to reinforce the trunk/branch is a good idea.
Ka Pabling- Member
Re: The World's Most Unusual Bonsai Procedure
Wow, what a busy guy that bug was! Somewhat spuriously, what if we could recruit these things to work on demand, allowing us to string up our trees with internal wiring giving us the ability to pose them as we wish like a Gumby doll
Velodog2- Member
Re: The World's Most Unusual Bonsai Procedure
Quite an undertaking Rob...
Pat…mounted on my trusted stead, riding off wildly in all directions…
Pat…mounted on my trusted stead, riding off wildly in all directions…
bonsaistud- Member
Re: The World's Most Unusual Bonsai Procedure
It was a fairly good solution to the problem, well done! Keep us posted on the progress of this tree.
Best regards,
Marlon Machado
Bahia, Brazil
Best regards,
Marlon Machado
Bahia, Brazil
Marlon Machado- Member
Re: The World's Most Unusual Bonsai Procedure
padychitan wrote:Hi Rob
Termites are usualy more inteligent workers than the insects that attacked your tree. they eat the inner portion of the tree and leave a very thin portion of the bark so you will not know that they are there. they dont bore holes as seen in the pics. anyway whatever kind of insect(,probably stem borers) you did a magnificent job,leaving the wire in the hole to reinforce the trunk/branch is a good idea.
They left no telltale mark. The holes you see we made by me when I accidently broke off a few branches while investigating. They (it or them) worked stealthily for several years, in hindsight I now know what termite detritus looks like and will be more vigilant.
Rob Kempinski- Member
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