I don't have a plan for the beetles this year other than cut off rose buds (what are left) soas not to attract so many. Or I just let them eat and not go out and look at it. They make me feel creepy.
So far I'm not allergic to it, have a relative who had a terrible rash when she had her baby. She won't buy it, of course. It was very hard to get rid of and was so bad she needed help with the baby. They always blamed it on Tide but she also would ream up bunches of lemons and oranges for the Vitamin C so it could have been that, too.
Good luck if you try it.
Japanese beetles have been a real problem for me since we moved here in 2002, but I have found a method of therapy. I fill a large-mouthed plastic container (such as a mayo jar) 3/4 of the way up with water, and then add a few drops of dishwashing soap. I shake it up, and then go from plant to plant and sweep the beetles into the jar. The soap breaks the surface tension of the water, and the beetles can’t get out. I don’t know how effective this is, but it makes me feel better. :)
It took me about 5 years to get it all cleared up the last time I got it. Started with the Tide, and then my hands broke out.
Then the doctor gave me stuff that made it better, but it took a long time to go away completely, and everything seemed to irritate it. It was awful.