wiltshire, United Kingdom
I have a mature, tall silver birch with recently discovered rot in the main trunk. About 15 foot up the main trunk it splits into two branches. I suspect years ago there was a third at this same level. I had a treeman in taking a lower branch off and he noticed a short rotten stump in the "V" between the two branches. When this was removed he found rot down into the main trunk. He scooped this out to find the extent of the damage, which is basically now a hole several inches in diameter at the top and going down some 15-18 inches into the trunk.
Discussing measures to retard further rotting, and preserve the life of the tree (I don't want to cut it down just yet), I came up with filling the hole with concrete, which he conceded he had heard of, but wasn't too keen on (he thought the lime in a concrete mix could be counter-productive). He proposes pouring a large can of Arbrex in, waiting until it solidifies, then adding more cans in stages until the hole is filled, and finally sealing with a top coat of Arbrex.
- 25 Jan, 2009