Adding the concept of some form of bait -- food or heat seem to be the obvious options, might be the bee's knees. I'm thinking of a simple solar concentrator under one of these bait stations to create a warm attractive target (set out in the mid-to-late fall when the bugs are seeking out warmth) and attract the bugs.

For ag: a concentrated essence of whatever it is that most attracts the stinkbugs, with a similar detergent-water trap underneath, around field or orchard perimeters, might serve.

The bulk materials are inexpensive. The attractants, if sufficiently targeted, should not have an excessive impact on other insects.

The wasp angle also seems attractive, though potentially risky (see the cane toad angle from the story).