Another tree planted in the old hole won't get bacterial canker from the old roots, at least I think not. But the bacteria is everywhere. It's just looking for an opening to attack. It can enter through small cracks and even the leaf scar where a leaf falls off this fall. If the old cherry got it another one probably will also. Changing rootstocks might help. The chart below lists BC resistance for several cherry rootstocks.

I'm not certain what's attacking your apple. But a good fungicide would help.

Here is a link that might be useful: cherry rootstock chart

Thanks. You think it could be a fungus? Seems odd I would get it in two separate locations.

My opinion is that the Honey crisp is cedar rust. my honey crisp tree gets it easily when the other trees are fine. I spray the HC with baking soda 1/2 cup to one gallon of water. It stops it dead, but rain will wash it off. so on periods of frequent rain it can get ahead of you for a bit. The HC is such a wimp of a tree I grafted Enterprise onto it so it could retain some healthy leaves all year.

I have not proven this, but my attitude is the best way to raise honeycrisp organically is to have a tree like Liberty, Enterprise etc and graft some HC onto it once the tree is 4 years old and let 1/3 of the tree be HC and the rest the more reliable type

My Honeycrisp looks like garbage, while the seedlings i have around it look perfect...i almost thought it might have a virus, but i did some research on it and it looks like its normal. I think i'll graft it over today (chip bud) and get a few branches going on another tree.