The decay is triggered by a fungus that targets the tree's bark ... causing a sunken area of dead bark and, eventually, death of the branch. New cankers form from mid-spring, and once formed ...

That isn’t an option when the canker is on the trunk. Over time, the canker may expand and girdle the tree. Most trees infected with Cytospora canker decline and eventually die. If your tree was ...

This rot is caused by a fungus that attacks the tree's bark, with apple and pear trees being the most common hosts. If not addressed promptly, canker can kill a tree within a single season and ...