Diseased Tree (canker)?

Asked September 16, 2019, 8:27 PM EDT

6 photos grouped by 2 into 3 files. Each image is what you would see if you slowly walked around the tree and kneeled. Is this a tree canker? Is this something I need to be worried about/call an arborist? I first noticed this as I was walking around the property at dawn. At first, because of the depth of the pool of liquid I assumed it was water flowing into our yard from our neighbor. But on closer inspection it looks like sap from the tree and a shocking amount of it. Through the course of the day more and more of it has flowed away from the tree and is slowly being absorbed by the ground. But the sheer volume was more than I have even seen coming from a tree. Enough to have me worried. Any insights would be greatly appreciated. Kind regards,

Montgomery County Maryland

1 Response

You did not mention the type of tree or what the canopy looks like.
This looks like a type of canker and there are no chemical controls. https://extension.umd.edu/hgic/topics/cankers-trees-and-shrubs

We notice slime flux (wetwood) and girdling roots around the base of the trunk.
There is no treatment that will cure slime flux. There is more information about slime flux on the following page of our website. https://extension.umd.edu/hgic/slime-flux-and-wetwood-trees-and-shrubs

Girdling roots can cause a decline over time. As roots circle the trunk, they can slow, and eventually cut off the flow of sap in the tree. The crown may be thin with stunted growth. Weakened roots are unable to provide adequate water and nutrients to the leaves. Here is more on girdling roots https://extension.umd.edu/hgic/topics/girdling-roots

At this point we recommend that you contact a certified arborist for an onsite diagnosis regarding the health of the tree and the best way to proceed. It is possible they may be able to airspade and cut the girdling roots. Water the tree during dry periods and make sure mulch is no thicker than several inches and away from the base of the trunk. http://www.treesaregood.org/