I've accidentally damaged one of my apple trees - the tree is about 7 or 8 years old with a trunk diameter of about 3 inches.
It's a tree that has been cultivated to give three types of apple, and when I was moving the (large!) lawn with the tractor mower the long grass box emptying lever caught on the lower branch and tore it off. So that's one type of apple that's been lost.
It has torn off at the point of connection to the trunk.
Will this weaken the tree (I get a lot of wind where I live)? It's not staked.
Should I apply anything to the damaged area?