Here is the result - rotting bud:

It is very disappointing considering how long it takes for a new growth to mature enough to flower. I think I will never see its flowers. :(
Bellatulum was sprayed too but it didn't matter for the bud. It is starting to open now. Probably tomorrow or the day after it will be in full bloom. This is just a preview (looks kind of funny, doesn't it?):
