+1 to neem oil, I used a 3 in 1 from Organocide I picked up at HD. Mix according to directions and spray a nice heavy coat on all your leaves and some on the ground around your hop plants at dusk. Kill or flick off any earwigs you find and check back at night in a few days. If you see them again you can re spray. If that doesn't work then I know the sevin powder form says it will kill them. I ended up using them both a few months ago cause my plants were being chewed heavily. I now just spray with the organocide about once a month and haven't seen any earwigs in a while.