I’ve been told that lime works on a host of vermin.
2 years ago the Japanese beetles got so bad I was worried I would lose my blackberry canes. blackberrys are petty indestructable, but the beetles had striupped almost all the leaves. I went oput late one Friday evening, just before sunset and hosed them, and all my fruit trees which were also affected, down with a weak maathion solution, about 2/3 normal strength. the next morning, my serious infestation was down to a few nuisance stragglers.
don’t like going to extreames like that, but hate losing crops and expensive permaculture canes and trees. they take a while to establish, so I get a little protective of them.