Wet Bark but No Pencil Tip Frass
I care for.the gardens at a property in Chevy Chase. I noticed that one of the mature trees at the rear of the lot had liquid oozing from bores in the bark, but no penicl-tip frass - both of which indicating Ambrosia beetle. Instead, there were these foamy mounds coming from the galleries in the bark. Any idea what this might be?
This looks like slime flux. It is possible there may have been some bark cracks. There is no treatment that will cure this. 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