Thanks, Millet. I am thinking I might spray frequently to try to catch flowers before bees come pollinate them. I have a hive located about 300' away so the bees are very active when citrus are blooming but there are quite a few other citrus closer to the hive. If I really need to, I can throw a cover over the tree.

Lots of good information here.

There is still lingering the question of if you spray GA3 on a receptive bloom will it become unreceptive to further pollination?

I'd like Skeeter to update his observations too!