This does not look like black knot, but a common decay fungus that is not damaging but merely lives on already dying wood. We recommend that you prune out dead branches or some of the competing trunks on this multi-trunked tree (or have an arborist do so). Wild black cherry trees usually only have one trunk. 

If your cherry laurels have a problem with cherry shot hole disease, new ones will have the same problem.  This page explains cherry shot hole (which gets on cherry laurel as well as all ornamental cherry trees.)https://extension.umd.edu/resource/cherry-shot-hole-flowering-cherry-trees 

Replace the cherry laurels with different species of shrubs. It will look more natural and having plant diversity will lead to fewer disease and insect problems in the long run. We recommend using native plants wherever possible. 

The camellia has exobasidium leaf gall, which is not dangerous.  If you think it is unsightly, pull it off or prune it out. Here's more: https://extension.umd.edu/resource/exobasidium-gall-azalea

Ellen

Hello Rick,

Yes, this added image does appear to show classic Black Knot symptoms. Fungicides are not effective for this disease, so your current approach of pruning out galls is all you can do short of replacing the tree. (Since wild cherries offer excellent wildlife value, including for songbirds, this would be a last-resort recommendation.) This fungus tends to only affect cherries and their close relatives, plum (especially the decorative purple-leaved flowering plums).

Here is a little bit more info: https://extension.umd.edu/resource/black-knot-disease-trees

Miri