Most of hte broad spectrum poisons do not affect many of the stink bugs although many people do report that Neem Oil products can help. Floating Row covers, to keep them from plants, is a good means of control. Hot pepper sprays are another deterent that appears to be effective.

I mostly have had stink bugs on the squash. Now that I grow the squash up on a large concrete re-inforcement wire cage I have very few problems.

I'm a newbie- is there any truth to the red pepper/garlic/onion concoction as a good deterent?

I too have had quite few of those evil little tanks--on cukes and squash--mostly--I go hunting in the morning and knock them into water with dish detergent (with plastic fork--ewww) I'm guessing a soap spray would work. I heard Woolite and water work in the house, but a good organic castile soap (Dr. Bonners) would be useful for plants--I'm going to look up a recipe and try it, just BE CAREFUL, the spray can burn plants if not used carefully--I found out the hard way--just follow directions carefully--also try a diatomaceous (DE) duster--google images for a look at the nymphs and eggs (like squash bug eggs,only whitish) so you know thy enemy!