How can I get rid of Japanese Beetles without using poison?

http://www.finegardening.com/make-your-own-natural-spray-japanese-beetles

You can try using Beetle bags they crawl into the bags and then they can't get out they hang from little things like your little welcome signs do you can get them at most hardware stores.

The beetle bags work well.

But do the beetle bags get rid of the good beetles too?

Get a five gallon bucket with a lid from the hardware store or garage, a large funnel and a Japanese beetle attractant from the hardware store too! Cut off the narrow part of the funnel and a hole in the bucket lid to seat the funnel comfortably. Place the attractant into the bucket, it smells like cinnamon and cloves, place lid back on bucket and leave it in the yard. My bucket attracted a couple of inches of beetles when I checked it after a few days!

The most effective way is also difficult and time consuming - pick them off by hand, and drown them in soapy water. Here is a link on a few other techniques: https://www.almanac.com/pest/japanese-beetles

Japanese beetles love the aroma of this mixture. I put this in a 5 gallon bucket and set it out for them every year. 2 packets of yeast in 4 cups warm water and 1/4 cup sugar then I add two mashed ripe bananas, stir and set it out by your beetle ravaged plants. The idea is to give them a better choice of food. WARNING: if there are small children around put a lid tightly on bucket, just drill/cut a few 2" holes in lid.

Another method... if you have a strong stomach or know a kid that likes to kill bugs is to capture a cup or so of the beetles, put them in a blender you no longer want (yuk) with water blend on emulsify, strain results into a sprayer and sprites the beetle afflicted plants. For some strange reason Japanese beetles don't like the taste of their liquid species on their food. Go figure?