Use Mosquito bits for the larvae and sticky traps for the adults. Get yourself some Captain jacks dead bug as well. You can use Captain jacks as a preventive.
A 25% mix of hydrogen peroxide and water (1:3) will kill the larvae already hatched and eating your plant’s roots. I lost a whole tray of pepper starts to the bastards before I started taking them seriously.
I e been using mosquito bits in my water and it’s significantly helped with fungus gnat control while growing organicly
I mix 2 tablespoons of Dawn dish soap in a 1qt spray bottle and soak the soil. Works better than neem oil.
Are you still practicing knf?
I don’t fallow it strict. However I certainly use inputs and ALOT of microbiology. I’ve read a lot of literature on it. Actually now I have some cow bones I boiled up and then soaked in organic apple cider vinegar to release the calcium and phosphorus. I make compost, Lactic Acid Bacteria. They solubilize nutrients in the soil. Phosphorus one of them. I was using Cold war organics but recently started with Gaia green. It complements my growing style better. I like putting home made inputs in. For nutrients and microbiology. Then every couple weeks I throw a spoon of that in the soil. I can ALWAYS tell about ten to 12 days later when it becomes available. I also utilize herbs in my indoor garden. Other terpenes bring out terpenes. Here’s a few pics of my current