Weeping Cherry Tree cankers?
Noticed this year a lot of sap and peeling bark off the trunk of our weeping cherry tree. Is there anything we can do to treat this. Had a full head of green leaves this summer but now many are turning yellow and falling. Please help. Thanks in advance.
Several things going on with your tree.
We don't see gummy sap, but what looks more like wet wood. This could be slime flux and not a problem. Look here: https://extension.umd.edu/hgic/slime-flux-and-wetwood-trees-and-shrubs
On the other hand, the cracking wood and dropping bark suggest that there are disease cankers below the surface of the trunk. They cannot be treated.
The yellow and dropping leaves may be cherry shot hole fungus, which is doing the same thing to almost all cherry trees this year. The wet cool weather this spring and summer has led to a tremendous amount of this disease. Look here for help: https://extension.umd.edu/hgic/plants/cherry-shot-hole-flowering-cherries
Lastly, we see stubs of broken branches (such as the one with the birdfeeder). These decay and introduce pathogens into the tree. Stubs should be pruned off and not allowed to decay on the tree. This has a good diagram on page 2: http://extension.umd.edu/sites/extension.umd.edu/files/_docs/programs/hgic/HGIC_Pubs/TreesandShrubs/...