The only plants bothered by japanese beetles in my garden last year were the pole beans. They were all over them. Has anyone else experienced this?
Until they cleared the lot across the road about 3 years ago I had not seen a Japanese Beetle in 25 years but after that lot was cleared they appeared on my sand cherries, nothing else. They are attracted mostly to plants that are under stress for some reason, so if you can determine why those particular plants are under stress, or can deliberately grow plants under stress as a trap crop, you might be able to control them more better.