I am now aware of the 3 cut method of pruning the tree to avoid damaging the bark. I am at the brink of loosing a tree because of bad pruning and not noticing that.
Now this may sound a silly question but I can't understand this that when we cut the tree even using the 3 cut method, a proper cut. The circular area that is left wide open revealing the inside of the tree after a proper cut, can't the bacteria or other disease enter through that anyway ? Or people cover or use some chemical on that to avoid bacteria from entering from that area.
I mean like this circular open area after a proper cut
How can bacteria enter from a damaged bark but not from this ?