There is an Asian orgy on my grape arbor and I don't like it. They are already chewing holes through the leaves and by the looks about to be laying eggs. Im a stickler for not using chemicals of any kind . Is there any natural repellent to deal with them? Five years on this farm now and first summer Ive had a problem with the dang things. So far they are leaving my garden alone. Hope i don't have to spray anything on the garden.