If you are talking in a greenhouse, exclusion is the answer. I've had regular stinkbug damage outside. But see maybe a couple a year inside. I run an exhaust fan 24/7 in summer. This helps exclude more than stinkbug. All the good scents that attract many insects are coming out the exhaust fans. The bugs can't get in that way. Put an insect screen over the air intake and stinkbugs are out of luck.