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Old 11-13-2013, 05:12 AM #11
bigbufu
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Ive had experience with gnats and got them away with various methods. The sand on top of the pot is solid and will knock out the flying ones as they are unable to reach the soil to reproduce etc. Also crushing up mosquito dunks and topping the pots with the crushed up dunk definitely helped as well and I now always layer my coco with the dunks just crush them up and toss some on top of the medium WAY BETTER RESULTS THAN KEEPING A DUNK IN YOUR REZ. To top is off I used azamax as a root drench and I havent seen those fuckers. Also a P-Bomb will knock out a good amount of the flyers if your population is getting out of control Id definitely throw some bombs in there. Anyways having the proper equipment and knowledge is key in knocking these pests out.

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Old 11-14-2013, 02:41 AM #12
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Try Mosquito Bits. Just sprinkle on top of coco/soil every three weeks, and water activates it.
But like snow crash said, keep everything clean! No standing water. I also dump a little bleach down every drain, toilet, and sink in the house once a week.
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Old 11-14-2013, 03:06 AM #13
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You can look for products containing bacillus thuringiensis israelensis like Neudomueck f.ex.
They sell those products to keep ponds and stuff mosquito-free and it works with those gnats as well.
The larvae of the gnats in the coco/soil eat it and then it dissolves their digestive system.
then get the adult flies with yellow stickies and break the cycle with a perlite top layer.that worked for me perfectly.

sounds really harsh, but it does the job efficiently and it's not affecting the buds, so you can use it even during last weeks of flower.

Mine were all gone after a couple days.

good luck &take care

cc
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Old 11-14-2013, 03:46 AM #14
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I just got back from the store with my usual predator nematodes and some of that stuff called gnat-nix. I have never tried before but its basicaly those growstones crushed really fine. Since they're made from recycled glass it's supposed to shred em like DE, but it can get wet.

I grow in 100% coco in airpots with multiple feeding per day (DTW) so keeping these fuckers at bay takes vigilance. I don't catch or see many but that's because I am proactive with the nematodes and will step it up if I start catching too many.

My hope is that this is one more tool to keep these fuckers in control. But will continue monthly (or more if needed) nematode applications.
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Old 11-14-2013, 04:04 AM #15
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try neem oil.
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Old 11-14-2013, 04:19 AM #16
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SM90 @ 5ml per gal. completely eliminated my gnat problem in about a week, and has kept it gone for over a year. I use it with every watering, veg through flush. Just do a through soaking of all of your plants to get all of the eggs.
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Old 11-14-2013, 04:27 AM #17
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Originally Posted by billy_big_bud! View Post
try neem oil.
My next tool I would consider would be the active ingredient in Neem, Azadarachtin, but I opt for Azamax or Azatrol over Neem when drenching. I use Neem for foliar and Azamax for drench.

But I have kept FGs at bay with only predator nematodes. Thankfully, for now anyway, that will be the extent of anything I put into the media. The only other thing I am doing is the top dressing of gnat-nix.
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Old 11-14-2013, 04:28 AM #18
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As you formulate you plans of attack, here are a few facts to keep in mind.

1. The flyers do not eat.
Their sole function is to mate and lay eggs in, as yet, uninfected areas.
They do no damage to the plants other than laying eggs.
Yellow sticky traps immobilize them but only prevent new infestations.

2. You can have a large population of gnat larva munching your roots before a single flyer is seen!
Seeing flyers indicates that they are getting too crowded under the surface.
Only then will some of them become flyers.

3.A healthy, robust plant, can survive, and even thrive with an FG infestation of the roots.
But stress from anything else will be additive and doing things like over drying coco will give the larvae the upper hand.

So, protect your uninfected plants with a surface barrier before you see the first flyers.

Go after the larva tooth and nail.
Whatever it takes.
Nematodes and fungi will take out a light infestation, or at least control it.

For a really bad situation there's a sure fire wipe-out method but it's definitely not "organic".

Add a tablespoon of Adam's flea and tick shampoo to your first wetting when mixing soil, or coco.
That will deter the flyers, as will dryer sheets laid on the surface.
The flyers avoid it so, no new larval infests.

An existing larval mass will be completely purged by watering with a teaspoon of Cutter backyard Mosquito concentrated spray added to the watering.
It's a combination of Lambda-Cyhalothrin and a repellent.
Offers 4 weeks of Mosquito free, outdoor living
How safe that is, I do not know, but would not recommend it's use during flowering.

Now, It's all about prevention.
I use dryer sheets atop the coco and have not seen any Fungus gnats for a very long time.

Yeah, I know, proves nothing.
(No see any Tigers? Den dis Tiger chaser charm mus' work!)
Should they ever stop being effective, I'll post it.

Aloha y'all

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Old 11-15-2013, 03:47 AM #19
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Azamax drench wiped them out fro me.
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Old 11-15-2013, 06:30 AM #20
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what worked for me,

gnatrol, but it needs to be shaken heavily in the water, or left for a long time to really get mixed in the solution

I've always wanted to try nematodes.

I hear the new thing in the organic section is adding neem cake to the mix, as it's the pressed seed for neem oil...


basically wipe the fuckers out, as the more rooms you work, the bigger the problem they become. also one can re-populate the whole problem again..
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