I wanted to try these superroots pots, was hoping the small ones for starting cuttings would provide a better root ball to transfer.

I found out with all those air holes, the gnats have plenty of ways to enter the potting mix.  I had swarms of them, and lost 4 out of 5 cuttings.  I sprayed with BTI shortly after noticing them to no avail, the damage was done.

I guess had I used a nylon to cover the entire container from the start I would have been ok, but I won't be using them for cuttings any more.  I think they will be useful for air-layering... outside.

Thanks for sharing the feedback, Phil.

Yea those gnats have taken the fun out of our fig hobby. I hate to ask for cuttings knowing them pests have taken hundreds of my small trees that were cups/small pots. Eventually we will win some battles...LOL

I don't know if its right or wrong, but when I up potted the lone survivor I mixed up a BTI solution and used it to wet out the potting mix. I assume the eggs are already in there, so when the larvae emerge they should eat the BTI and die.  I will do that for anything that needs to stay in the house, unless I find it doesn't help.  So far I've only an issue in the humidity bin, I don't want those little buggers invading all my houseplants!

At my house, the fungus gnats go nuts for the growing medium I mix for my fig trees. The thing is they really like if it's fresh, any tree that was up-potted this spring is fine and the gnats could care less about them. Maybe somewhere around 3 months is the cut-off. And the fresher it is, the more they are attracted to it. I got a banana tree and tissue culture fig a few weeks back, I up potted the fig right away and waited a week before up-potting the banana. Those 2 pots have gnats worse than any I have ever had. I used BTi a week ago and so far I can't tell any difference. I will be giving them another treatment tomorrow.  I'm thinking about ordering some nematodes again. I need to get them under control, as in gone, before I start dealing with cuttings in month or two.  When I have cuttings, I nuke all the medium I use with them  to kill eggs and stow-a ways so gnats are never a problem until one gets in.
On a side note, small centipedes are death on fungus gnats.

Do the gnats originate in the growing medium or are they attracted from the environment?  I used straight fresh Promix HP and perlite last year for my cuttings and had real gnat issues.  As an experiment I started some semi-harwood cuttings a few weeks ago but I sterilized the Promix/perlite in the microwave first.  We'll see if that makes a difference.