best way to kill fungus gnat larvae in flower

I'm approaching week 4 of flower, and I'm fighting them right now myself. I can't tell you if this will work for you, and I haven't been able to get rid of them yet, but they haven't gotten out of control either.

- Mosquito Dunks contain a bacteria that attacks the gnats. Dissolve some in your water when feeding. Maybe let it dissolve for a day or so in advance.
- sticky traps for whiteflys and stuff to grab the adults
- diatamacious earth will work, but I hate using it because it's really bad to breathe, so use sparingly and breathe with caution
- a small container of wine/beer/apple cidar vinegar will attract them, and they will fall in and get trapped = die
- sand or perlite on the surface of the soil, the adults don't like. I'm using both currently.
- let containers dry as much as reasonable
- spray any you see with insecticidal soap

just sprinkle cinamin on top of your soil after you water them just plain old cinamin

i was going to say kill it with fire...but you've got plenty of good recommendations above

Originally Posted by DrFever

just sprinkle cinamin on top of your soil after you water them just plain old cinamin

No shit? sounds like a solution worth a shot. what about when you water next, you think its washing that into the soil and changing anything? like flavor or what not?

4-1 ratio of water to hydrogen peroxide 3% and water with the solution, it kills th on contact, then you cam apply the DE.

Originally Posted by jamboss

4-1 ratio of water to hydrogen peroxide 3% and water with the solution, it kills th on contact, then you cam apply the DE.

If you're growing is soil, this will also kill all of your beneficial bacteria. Not advised for organic or soil growers.

use gnat off and sticky fly traps too for quickness to rid them and then

put an inch of perlite or sand on top of your soil and the fly larvae cannot get up through it to reproduce.

Lotsa people swear by cinnamon. It's a natural fungicide.