best way to kill fungus gnat larvae in flower

i'm having a problem with fungus gnat "larvae" and im in week 3 of flower. I know there are many different ways to treat this problem but my question is which way would be the "safest" as i'm in flower.

diatomaceous earth?
nematodes ?
gnatrol?
preditory mites?

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

DrFever said:

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

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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.

jamboss said:

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.

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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.

in all seriousness i had gnats one time used cinamin litterally they dropped dead on the spot fungas gnats occur and like wet areas an live 2 " in top of your soil thats why so me many ppl will add sand on top of there grows just wait till plants need to be fed once you feed them then sprinkle cinamin or just sprinkle cinamin it the flying gnats that are adults there not to fear its the larvae in your soil thats the root cause i swear by try it once and there gone when its time to water again just water no big deal if your worried then re apply cinamin again on top of soil

chunks of potato will attract the knat larvae.all you need to do is put a chunk of potato on the soil,leave it there for 2-3 days then check the potato,you should see the larvae all in it.

indagroove said:

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

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cinnamon works the same way but with fungus. Cinnamon is a natural anti-fungul/anti-viral.

man , i tried the cinnamon in my tent and it worked good. But my "flower room" was another story, i sprinkled cinnamon on 4 pots as a test , last night i went in there and the gnats were crawling around on it .Almost like they were laughing at me , like ha ha cinnamon , really ?

I am going to get some diatomaceous earth and some gnatrol ,as i'm using Super root airpots i think i'm going to have to spray the shit out of these pots including the top and sides http://www.amazon.com/Superoots-3-4-Gallon-12-5lt-Air/dp/B004AW769C ^^^

Sprinkle granular neem into the medium if your using soil or coco and water normally. this worked for me

I still say kill it with fire

well obviously you didnt add a lot of cinamin you need to cover it good