Is there any way to control Japanese beetles?
Study the habits of the beetles, where they are mating and what their eggs and nymphs look like. Then take a shop vac and the corner nozzle attachment and suck the little buggers up. Try sucking up the eggs as well. Empty the cannister immediately, tie the contents up in a plastic bag and throw them away. You may have to do this once a week for several weeks until they are eradicated. Remove any damaged plant material to promote overall health.