Need help diagnosing avocado tree problem and inwuiring on yearly timeline on care for it and

Question

Can you help diagnosing avocado tree problem? It is over 30 yrs old Pictures include area at base of tree, leaves, current size of fruit,etc. I have also included some other pics of tree taken in the last 5 yrs as a comparison.

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Answer 1

This appears to be a fungal issue. I would apply wettable sulfur around the area, and prune off any dead branches. Here is a link to an article that will help: https://www.gardeningknowhow.com/edible/fruits/avocado/