Hello, We've just moved to Port Alberni, where we have a Prunus Tree (possibly a cherry) in our back yard with a thick coating of green slime on quite a large portion of it's truck. Is this cherry sap infection, or perhaps bacterial canker? It looks too gelatinous and green to be gummosis. Should I worry about this spreading? I have several plum trees nearby that I'd like to keep healthy. Should I cut down the infected tree, as there is so little healthy wood to cut back to? Lastly, how common is this for my area? Hopefully I won't have this to look forward to often. Thank you kindly!