Fine photos OP!
To the bugs. You may have to treat with a more drastic measure if you want immediate results by using a contact killer(insecticides) such as deltamethrin,pyrethrins, permethrins,etc. It will kill on contact but care be taken on young plants and those if eating fruit. Read Labels.
I use Malathion when infestations get bad on my ornamental cherries.
Neem works, but takes longer to disrupt behavior of insects making them not eat or reproduce or to fly. The problem is overwintering eggs of the flies, so must treat late winter and stick regiment of treatment. I would not use the Neem more frequent than every 7 days.
Good luck, hope you get them under control.
