| my mature maple tree has broken bark and a black color where the large limbs join the trunk of the tree. Does this mean the limbs are in danger of breaking or is it normal? |
| Black areas on the bark usually indicate physical damage and oozing sap. The sap is high enough in sugar content to develop fungal growth. I'd be concerned that borers or bird pecking has damaged the bark. You might want to hire a certified arborist to assess the health of your maple and suggest control/treatment options. |
