Q.My Mature Avocado Tree Trunk Has A Has Green-grayish Mound Which Has Spread From Lower Trunk To Branches. Leaves Are Copper Color
d. Can tree be treated This condition started about a year ago and is spreading up the toward upper branches and leaves. Tress was planted from seed about 15-20 years old.
Certified GKH Gardening Expert
There are lots of possibilities for the exudate on the trunk. If an injury causes it to leak sap, it dries in a white crystalline form. The gray-greener ones could just be lichens, which are harmless. The leaves though, do not look good. I've included a link to an article with a photo that looks a lot like your leaves. It could be drought stress, salts, high pH, etc., which are discussed in the article. I've also included a sheet on diseases with their symptoms, which you may recognize.
https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=12827
https://www.gardeningknowhow.com/edible/fruits/fegen/fruit-tree-lichen-and-moss.htm
https://www.gardeningknowhow.com/edible/fruits/avocado/sunblotch-in-avocado-plants.htm
