A novel trick for borers in fruit trees

I posted this in another forum, but it was deemed better placed elsewhere.

I had a cherry tree that had a borer.  I overheard a friend talk about a possible solution. I asked him about it.  Then I tried it.  

I kind of saw it and tried to stab it with a paper clip, but it didn't work, so I tried his idea.

This sounds crazy, so bear with me.  

He put aquarium cement all through the holes in the tree.  The theory is it suffocates the borer, it dies because it can't get out and breathe, and the tree then lives.

I tried it. It worked! The tree is still producing cherries, 10 years later, and has no holes nor borers.  I have had no other borers anywhere.
 
The tree has since grown through the aquarium cement and it just looks like a normal healthy tree.

Aquarium cement costs about $5.  

The tree produces way more than that every year, and it makes me happy.  


John S
PDX OR

I don't know what aquarium cement is but do you suppose any non toxic thing that we can squirt up there and it sets up would work?
I've gotten behind with the peach tree borers clean up and I"m afraid the tunnels are extensive now.  I usually clean them up and poke around with a wire, then pile ashes against the trunk.  

I've used tree paste made from cow manure and clay to some degree of success. I usually stick a piece of thin wire as far into the borer holes as I can and try to eviscerate the little bastards first, though. Lime plaster is also good on wounds, especially where bark has died back or peeled off...the light colour acts as a sunscreen.

Seems like 100% silicone which is food safe would work. May have to reapply.