I see none of the best experts have chimed in here, so I will do my best (though I don't grow cukes or peppers, and don't grow in containers!). I know these tend to be delicate plants, so maybe the mixture you sprayed on them burned them? Especially if it got sunny and hot afterwards?

But overall, they really don't look that bad. You could remove the most damaged leaves, so the plant can put more energy into the healthier parts. But I don't think you've ruined your garden by any means.

And now my post should, I hope, bump your question up higher and maybe a cuke/pepper/container expert will notice it :)

Unfortunately some of what you are now seeing is due to the spray you used. Especially in the last 2 pics. Too often new gardeners tend to over-react to some holes in the leaves - which happen for all sorts of reasons and most of the time are not an issue - and spray something. Leaves on plants can lose up to 1/2 of their leaf surface without any problems so if you spray many times the spray does more damage than whatever made the holes could do.

That is just as true for homemade concoctions as it is for commercial ones. Indeed in the hands of the under-informed the home made concoctions can do more damage than commercial ones do. In other words, just because it is made from products you have at home doesn't mean it is safe to use on the plants.

I don't see any actual discoloration issues in any of your pics but they are usually nutrient issues rather than pests. The holes in the leaves could be caused by all sort of pests - slugs (have to do nite time patrol to find them) , beetles, tiny caterpillars, even birds. But you have to look carefully for them and ID them first before you spray anything. Most of the time you can find whatever is doing it and just squish it with your fingers.

But if you don't see them it doesn't mean you have to spray something. He may already be done and gone and if you do spray the odds are you are just killing good guys that are trying to help. You remove the damage leaves and continue to monitor it and look for the bad guy. So no need to panic and no need to spray unless it is a really really bad infestation and you know exactly what is doing the damage. Then you find the least damaging control for that specific bad guy.

So in your pics remove the bad leaves off the cuke and nothing more. Remove the very worst of the leaves off the peppers but leave the ones with only minor damage. Leave the beans alone for now. Put the bottle of oils away as the oil only works if it coats the insect but when it coats the leaves it causes them to burn and blacken and prevents photosynthesis.

If you feel you must use a home made spray then I suggest you stick with the soapy water mix of 1 T of mild soap (baby shampoo, Murphy's Oil Soap, liquid Ivory, etc.) in 1 gallon of water, shake well, spray the bugs only and avoid coating the leaves, and only spray in the early AM and never in the bright sun or the heat of the day. Spraying then is almost guaranteed to damage the plants.

Hope this helps.

Dave

Thank you so much Dave - I honestly thought it maybe was the spray because they weren't too bad until I sprayed them with that homemade concoction I got from you tube. It also explains why the other plants seem fine. I will remove the worst leaves as you suggest and maybe just plant some more peppers. I really appreciate it!!