I put my zone and location in my profile, but didn’t realize the “about me” was the only part visible to others. It should be there now. I’m in z9b, Topanga Canyon between Santa Monica and Malibu, at aprox 1100’ elevation. 800-1100 chill hours below 45F.
The avocado tree in question was partially in the shade, under a thin pine tree, and since it was late fall/winter when this occurred, it might not have been sunburn. But then, this is S. Calif. and it’s sunny most of the time. I hope that’s what it was, and not an infection of some kind.
I’ll post on the tropicalfruits forum as soon as I have time.