Experts and BHG readers answer.
Thanks for writing. Japanese beetles can be tough to deal with. Try spraying them with neem oil or, when possible, picking them off by hand and dropping them in a bucket of soapy water.
You should be able to find neem oil from your local garden center or nursery; it's an organic insecticide that's made from the oil of a tropical tree.
---Justin, Senior Garden Editor, BHG.com