Help might be at hand

Many of my plants at the allotment are suffering with black fly. I can see ladybirds on the plants but we also have ants who guard the black fly.  I got some ant stuff to try and help with the ants. I am not keen on spraying the black fly,  but I spotted a wasp today. I feel that the wasps help, so hopefully between them and the ladybirds they can reduce the black fly.

Not much else going on, we sat in the garden having our dinner drinking wine and relaxing.