I that it's ants messing with the plants. I do remember seeing some very tiny blank ants on my zucchini last year (on the thick stems), but they were only there for a short time, and I never say any damage from them. You did say though "green insects". That's a broad description.

Holes in leaves - in my experience - have been due to caterpillars. I've had problems with cabbage loopers and melonworms eating zucchini leaves.

I recommend looking very closely at the bottom of (ideally) all the leaves, looking for pests. You'll need to do some detective work.

I too have a raised vegetable garden bed, am relatively new at it (started last August), live in the hot south (southern TX), and use organic principles.

Let us know what you find!

Correction at the beginning, above. I meant

I [doubt] that it's ants...

We have to have our yard sprayed every year by a profesional pest control company, because of army worms. They sprayed our yard last Monday. These army worms get into the oak trees. They travel by ground and eat large leaf plants before they get into the trees. I have holes in my ornamental kale, hibiscus, and datura leaves right now. Barbra

Sounds like it could be aphids if they are very small and green. The ants farm them and move them around to the newest shoots and leaves. For organic try some insecticidal soap spray. It can be used daily all the way up to the day of harvest. Be sure not to spray in the middle of the day when its hot and sunny or else you will burn leafs on the plants. I fight aphids every year in my vegetable garden and expecially on my Blueberry plants. Sometimes if I have nothing to do I will walk around and squish aphids with my fingers because it really self gratifying!