I have recently moved to a new house where the cherry tree in the back yard is doing poorly. From info online I have determined part of the problem is probably caused by bacterial cankers. The leaves are filled with holes and are browning as well as the sap coming from fissures on the lower trunk. My question is...what is the best course of action? I would like to try and save this tree if at all possible. My guess from what I have read (if this actually is bacterial canker) is to paint the trunk after using ziram for drying the gummosis and then use a copper based fungicide every spring. Is this right? I am attaching some photos as well because I am thinking there may also be some other problems with this tree.