We have a very large, old piney oak that is in our backyard and is about 50 feet tall. We moved in about two years ago and it was beautiful. Now, there is green fungus growing up the bark. Also, some smaller branches have died. Could give me some idea of how to treat the green fungus?

The fungus you are referring to may actually be Lichens that are growing on the tree. This will not harm the tree if that is the case. Lichens are actually a sign of good air quality. The smaller branches that are dying back may be smaller limbs that are being shaded out by the canopy on the interior. Some small branches are somewhat expected. It is hard to answer this question without looking at the tree. Make an appointment today to have a certified arborist come to your property to inspect it further.

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