No, George, I have not checked with anyone, just here. My desert area has just one nursery (inherited by my next door neighbor) with little actual knowledge of growing things.
It seems odd to me that watering could be the problem because the entire yard is on an automatic system that waters five minutes AM then 10 minutes PM. Plus the problem tree is next to the prolific lemon that bears too many to find use for each year.
Those two trees are in a center yard, raised rock covered and curbed bed with soil beneath, sand under all, and are only shaded by a Cottonwood as the sun goes down.
As to the two miniature apricot trees, sad to have bothered with planting them. The skin is tough and the barely more than quarter size fruit that does not fall off even before ripening is all but tasteless.