I meant to say without pesticides
Are you sure they are stink bugs and not tomato horn worms and squash worms?Spray them with a horticultural oil. Several applications may be necessary.
Since these pests feed and lay eggs on garden plants, you may also want to try spraying them with a kaolin clay (mineral clay) solution as a method for stink bug control. This prevents the bugs from both laying eggs (as they won’t attach) and feeding on plants. It’s also safe for plants, including edible ones, and washes off easily.
Sprinkle your plants with diatomaceous earth.
Thank you to everyone who answered, hoping one of these works. These are fierce destroyers! Have ruined most of my tomatoes and squash.
Remember you need to know exactly what insects they are before you can control the situation.
If you're sure it's stink bugs, there are special baits that look like a bag on a stake. They attract the stink bugs into the bag. Then you throw it away!