Easy, cheap, effective, safe way to rid yourself of fungus gnats.

I had a bad infestation a few years back, a family member who works with plants told me how to take care of it.

You will need, a cup/water/dishwashing liquid/white vinegar.

Put a squirt of dishwashing liquid into your cup.

Spray a nice forceful stream of water into the cup to make it sud up really good.

Pour in vinegar until the suds rise up above the lip of the cup.

Then its as simple as putting the cup in your grow area near the gnat infestation. They cannot resist the smell of vinegar (rotting fruit) and the moment they develop wings they are flying straight to the cup to get trapped and die. You need to refresh the suds daily (they dissipate).

Keep a fresh cup inside the infested area until you no longer see dead gnats.

I treat all my new soil this way. As soon as I get it home, I bust it open and nestle a cup inside the bag. Within a few days, if there are gnats inside, they are all dead.

althor had 20 more dead today in the cup! thanks so much man realy realy appreciated!!!


THIS SHIT WORKSSS ^^^^^^^^^

Dont be a dick. At least hes contributing.

VX420 said:

Yea Yea Yea, its 1909 again. Put some plastic wrap over the top and put holes in it with a fork. Gants go in but can’t come out. This is new how?

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Thanks a lot Althor for this post.

Thanks for the idea! sounds good and easy, and I hope it works. I like the idea of putting it in the bag of soil before you even plant, that is a good idea.

Neem seed oil, Dish soap, water, Cayenne Pepper.

Fucks shit up.

Or just put a layer of perlite on top of your soil... about 1/2 inch thick.... the perlite cuts into the bodies of the bugs and they die trying to get to and from the soil.

Jackrolls1 said:

Dont be a dick. At least hes contributing.


Thanks a lot Althor for this post.

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Yeah, I ignored it but since you quoted it, weird he is so upset and mad about something like this.
Pretty much everything online has been used and re-used and copy/pasted yet somehow this gets under his skin.
Oh well, tough shit. Get over it.

Beefbisquit said:

Neem seed oil, Dish soap, water, Cayenne Pepper.

Fucks shit up.

Or just put a layer of perlite on top of your soil... about 1/2 inch thick.... the perlite cuts into the bodies of the bugs and they die trying to get to and from the soil.

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I have used sand and perlite both in the past. The only issue I had with it was it made watering messy and a pain in the ass.

thank you very much althor,
I also do not want to use perlite,
I will try this when the light on

I notice fungus gnat larvae on my roots. im using 6x6 rock wool on flood table. never had this probelm until start using coco matt. my plants are yellow and leave falling off. I though it was root rot but could it be the larvae causing it? please help some one... I been getting this same problem with plants getting yellow only in flowering stage. and baby premature harvest. how can i get rid of the larvae roaming around the roots?

Chopsticks33 said:

I notice fungus gnat larvae on my roots. im using 6x6 rock wool on flood table. never had this probelm until start using coco matt. my plants are yellow and leave falling off. I though it was root rot but could it be the larvae causing it? please help some one... I been getting this same problem with plants getting yellow only in flowering stage. and baby premature harvest. how can i get rid of the larvae roaming around the roots?

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generally, in flowering stage lower leaves gets yellow. There is nothing wrong
the other problem might be inadequate light for that leaves

well im getting yellow leaves and dying leaves on the 2nd week of flowering.. this been happening to me the past couple round. i think its root rot also.. no one are able to help me!

Hi Thanks For this info, Noticed my gnats are starting to get out of controll, Though no dmg to the plant , i dont like them near my ladies

Im Trying Brown viniger since i dont have White. Im Not Sure what the differnce is . Since Brown Viniger Is Actually Differnt In Alot of countries and even the wiki doesnt contain it, Brown viniger could be Malt, apple cider, balsamic and even rice vinegar. Having Read the label though, i think my type is malt as its the same ing just with added colour.

Edit-Found Out From a cook that my brown viniger is White viniger with colour. Exact same process.

Edit 2- How long did it take your Gnats To Go For the Mixture? Mine DOnt seem very interested (1 hour plus atm)

I am giving this a try since it does not involve adding anything into the soil. I need more vinegar though.