Honestly, it’s not a fit for this thread, but Surround WP kaolin clay is supposed to work well at discouraging stink bugs by clogging their reproductive organs when they land on the leaves. Edible Landscaping in VA had it sprayed on my Nikita’s Gift when I picked it up years ago and it took awhile for me to find the stuff in stock somewhere. Keystone Pest Solutions sells 25lb bags.
On a similar note - white latex paint diluted 50/50 for trunk protection application is another household item. I need to take my own advice and get this on my trunks, maybe the next day it warms up.