Does anyone have tricks for repelling hornets from an apple tree?
I am not scared of the hornets; they're intimidating but quite peaceful. And they're protected, so insecticides would not be an option even if I wanted to use them (I absolutely do not). I also don't mind them devouring an apple or two, but they're like a plague o' locusts o'er the land. Netting isn't an option; the tree is too big and also moisture would get trapped and then I have a mildew problem.
Any other ideas?