Both bugs feed on veggie foliage, leaving telltale white blotches and wilting leaves.
|Squash bug eggs|
|Harlequin stink bug eggs.|
After the carnage, I sprayed the garden with Garlic Barrier, an OMRI product I've heard a lot about and am trying this summer. Don't expect much regarding the squash bugs, but am hopeful about the aphids. Will post if it's effective.
Recommendations for squash bugs include good end of season sanitation--clean up so the bugs don't overwinter in garden debris.