I also think @RickB ’s application rate seems high.
Last year I had about 40 bearing age apple, pear, and Asian pear trees between 15’ and 30’ tall and 5 LARGE peach trees.
When I sprayed all of them (while they were fully leafed out) I used 75gal. Eight foot trees should be using much less. If you are able to spray a concentrate you can divide the amount by 3x,5x, or 10x.
I’m working with some pretty bad equipment and can’t fully get every tree, due to height, so maybe should be using a bit more- but I would think my trees are at least twice the spray volume of an 8 foot tree- especially if they are pruned better than mine!
All that said I am jealous of anyone with a tractor and the ability to buy a nice sprayer and will follow and live vicariously through you!
When I was starting this thread had the best advice for me:
And talks about all the pros and cons of different fancy sprayers as well as advice. And sadly it does still take me 3-4 hours to spray my trees. I really need a better system this year.