I live a few miles away from you and have the same problem with Japanese beetles. I, too, tried neem with little luck. I tried the milky spores for the lawn to kill the grubs and traps. They worked, but all the beetles from the neighboring land still flocked to my abundant garden full of food they like. So, I've accepted that the roses bloom and look wonderful until the end of July, and then the plants start looking tattered. I still get blooms and plenty of color, too. Sometimes we just have accept what Mother Nature dishes out, like the April Fool's snow we had and the cold long spring that went immediately to summer. Maybe that weather pattern will slow down the beetles this year! We can hope.
I live a few miles away from you and have the same problem with Japanese beetles. I, too, tried neem with little luck. I tried the milky spores for the lawn to kill the grubs and traps. They worked, but all the beetles from the neighboring land still flocked to my abundant garden full of food they like. So, I've accepted that the roses bloom and look wonderful until the end of July, and then the plants start looking tattered. I still get blooms and plenty of color, too. Sometimes we just have accept what Mother Nature dishes out, like the April Fool's snow we had and the cold long spring that went immediately to summer. Maybe that weather pattern will slow down the beetles this year! We can hope.