Ya gotta break the life cycle. Use your fav soil drench for the larva. Let the top dry a few hours. Sprinkle DE on top and bottom water for a while. I get fly paper, cut it up and put on top of the media.Might be a good idea, but shipping them to me at this time of year could be a problem due to freezing temperatures.
I see that they are available, as are mites, on the Canadian Amazon site. Too many bad reviews for me though, so I will pass. Thanks for the suggestion though, I appreciate you making the effort.
The best is inoculating my pots with material from my worm bin. I get life along with castings and worms. All sorts of good helpers in there.