I'll chime in on the last ~10 days posts.
1) Soapy water is a good way to kill bugs you can collect in a container. Most bugs will float, and their exoskeletons are hydrophobic and resist wetting, soap allows the water to coat them and also enter their breathing apparatus. They will sink and drown, even a tick.
Soapy sprays also work on some bugs like aphids. I seem to get aphids on my brassicas in the late summer/fall. Insecticidal soaps are best and less harmful to plants, buy the concentrate, It can also be used as a wetting agent for other sprays like copper and sulfur powdered fungicides. Dish detergent works but may harm plants.
2) The time to combat squash bugs, I think they are the little stripped and spotted cucumber beetles in question? Is to do so as the sprouts emerge, which they can do a lot of damage to. This will keep them from breeding and large infestations to come. Hand picking is tedious, but effective for a few small sprouts/plants but not effective for mature plants.
There is a number of sprays that can be used and are also effective with other garden insects. See pages 52-53 of attached PDF from Cornell which deals with organic cucumber and squash production.
Pyrethrins and azadiarachtin (neem) products are two sprays which work on the beetles. Be careful with the former as it kills pollinators/most all insects/beneficials, but has short residual lifetime. Those two sprays and Spinosad and BT for worms/catepillars are good to have on hand in concentrates.
3) I've encountered the tomato hornworm but never got an infestation bad enough I could not control hand picking. Them SOBs will bite you too, non poisonous! I've never seen the wasp eggs on the worms (nice picture TNT) but by all means let the eggs mature. Maybe pluck off the branch it is on and set it aside? Spinosad and BT will work on those worms.
EDIT: Added NE Vegetable Guide PDF, 364 pp, covers most crops