When I was at Walmart looking for some insect spray for my plants I saw many that listed being able to kill Japanese beetles. Many brands are safe to spray and once the spray dries in an about an hour its safe for pets, and the wild birds. There are also many that are safe to spray on fruit and veggies while they are growing where all you need to do is wash the food before you eat. I bought a cool plant that was doing so well and then one day I came out and it was stripped of just about every leaf it had over night. It basically looked like a skeleton and it broke my heart. I ended up buying The Garden Safe brand insect killer which states its kills on contact where my new plant shows very little signs of being nibbled on. If you have outdoor plants and even indoor insect killer is a must.