What kills Japanese beetles on contact?

The organic fluids that you can use to kill these kind of beetles are really kind of hard.What you can use it bleach or some kind of cleaning product but for your plants you can go to your local grocery store,dollar general or Home Depot or Lowe's. What can you buy is something called bug killer that should do the trick now if that doesnt work sorry but this has been an unanswered question for years.