Ive seen parasitic wasps in my yard, infact i think i saw their larvae on 2 occations, 1 time they were parasitazing a caterpillar, the other time i found a live ground worm that was full of oranje little worms,this may have not been a parasitic wasp, dunno. Their life sicle is badass!
When i have aphid infestations outside, usually a strong poppulation of ladybugs gets established, cant beat ladybug at eating aphids, their larvae are the best thing that can happen to a garden.
To be fair, my plants leaves/canopies in the gh are above the line that the quail can reach, mine seem to nibble at the banana pups, those juicy big leaves do atract them somehow. Strangely they dont bother one potted surinam cherry that has its branches crawling on the ground, not a single nib on it so they do have preferences lol.
I also have scale on my citrus there and it doesnt get phased by any insecticide ive tried,nasty stuff. Only thing that works for me ( havent tried imidicloprid ) is removing them manually and ultimately spraying with a insecticide after that. One of my pomello is clean after this,still need to do the lemon which i badly infested.