There are lots of reasons to spray your fruit trees, organically or otherwise. But please don’t spray your trees when they are in bloom. Even fungicides can be detrimental to the honey bee (and many other native pollinators) in certain (and not-infrequent) circumstances.
There’s no reason to spray your tree when it is blooming. This is the time in which you want those pollinators to visit anyways! If you need to spray, spray before the bloom or after.
And please, always follow the label!
It’s hard enough keeping those bees alive. I thank you and my bees will thank you!