Hi! This is my first time posting onto reddit, but I have a question about gardening, I do live in southern MN, and I'm growing some items in pots while I get my in ground garden set-up! However I've run into a big issue of Fungus Gnats, I had a pot of Basil inside (that is now thrown out) that had a lot of the larvae... But I had some pots of stuff in my greenhouse, I took some of the pots inside due to high winds, and I realized in 2 of the smaller pots there were a few larvae and gnats which I used duct tape to grab the gnats, but for the larvae I have no idea what to do, the pots have been sitting inside with press and seal over them so none of the larvae escape and no gnats go into my other non-infested pots, I have one pot where it's mostly just larvae and I have no idea what to do, I used hydrogen peroxide (mixed with water) on the original pot of Basil (I would like to note none of these pots have plants they were all seeds, the basil did start to grow before I had noticed) and that seemed to help, I also took a small chunk of the really infested soil and used 70% alcohol on it which seemed to work on that small chunk... I did also resort to using a heat gun on another chunk of the really infested soil... But that pot is just 60% larvae and 40% soil, I really don't know what to do about it, I got those little apple fruit fly traps for the gnats and it doesn't seem to work, I did order the yellow sticky traps, to hopefully prevent this from happening to any of my good pots, but I don't know what to do currently about the larvae.. I'm hoping someone has a possible solution for getting "rid/killing the larvae but still being able to reuse the soil, because there's a lot and I don't want to waste it..
This isn't my first time gardening, I didn't do it a lot but when I did it was with my grandma and she no longer is here to help, so I do know how to do and take of some things, but I'm still inexperienced with this, and I believe the reason this whole thing happened in the first place is because I over watered the soil... I see a lot of mixed gardening media of watering plants, so I thought "Drench the soil because plants love water" because I had seen a lot of people say "You're not watering you're plants enough!!" Or something, sorry this is long.. I just don't know what to do about this..