I have these two trees in my back yard that are COVERED with these little bubbles of sap. They are dripping all over, the trees look pretty healthy other than the sap bubbles. I have no idea what type of tree's they are and/or if this is normal, but if it is a contagious thing I would like to stop it before it affects all my trees.
I also had a cherry tree that was dead when we moved in, the bark had little pin holes all over; I have a feeling it may be from the same thing.
Please Help! Is this normal? Is there something I can do to save them? Do I need to kill the trees before this spreads?