We live in the country so while I can deal with the local Japanese beetls, there’s no way to get all of them.
I put up the traps every year and the first year here caught a TON of them. Not so many in the following years.
The traps keep them away from the plants, otherwise, I wouldn’t do them.
I’ll deal with the stink bugs as I find them and will be stocking up on good DE, not the heat treated stuff I read about upthread.
I do see a few traps around. About a block away, somebody grows beautiul Carefree roses, put the trap right squat in the rose area lol.
But the odd thing is I inspected her roses for damage and didn't see any; this was about the time they die off; the adults don't live more than one season; one season a female will lay up to 60 eggs.
Oh did those traps get to stinking, had to change and tape the holes in the bags once a week, got hundreds. They'd poke their icky little heads through the holes pre-punched in the bags. They die a slow death in those, but I'm to the point I don't care.
It is more humane to put a few drops of dish soap in the water if you pick them off plants; they drown much faster, have timed them. In water they will swim and swim until exhausted, and some will climb up on each other and get away. I hate to catch them in strings, piling on to do the f word. Oh, and they prefer bright sunlight and worst in the HOTTEST weather, and lurk on rainy days so you get a break from the battle when it rains.