Fungus gnats suck and would be extinct if I was god, but I’m not, so Ill do the next best thing and destroy any of them in my household. These pesky little flies start off their life as maggots which eat the organic matter on the top two inches of your soil and they will also consume your plant roots. They can also spread disease to your plants and what results is leaves that look like this and sproutlings that may not survive. There is two methods I use to get ridd of them completely and as  long as you are willing to work for about 2 weeks, you too can have them gone for good.

To kill off the larvae or maggots, I use a mosquito bits tea. To make it,

I use 4 tablespoons of mosquito bits per gallon of warm or room temperature water. I place the bits in a mesh bag which I submerge and shake occasionally for 6 hours before the tea is ready.

The active ingredient in mosquito bits is BT which is toxic when consumed by the larvae.

Harmless to people, plants, and pets, Mosquito Bits® can be used on both ornamental and vegetable plants and will effectively eliminate the fungus gnat larvae that grow in the potting soil

Mosquito Bits Sell Sheet

For more information on BT, Check out this FAQ

You want to water your plants from the top and completely drench the top 2 inches of the soil. To play it safe, I let the water pool on the top at least 3 times. Then I let the excess water drain out from below.

The larvae lifespan is up to two weeks and the eggs are up to 6 days. So, you should rewater with this tea for another feeding or two to make sure they’re gone. Now the tea gets rid of the larvae.

You still have to worry about the flies. Flies can lay up to 200 eggs in their 7 day lifespan as a fly. To kill the flies, I use yellow sticky traps.


Have them hanging around your plants for a couple of weeks until you don’t notice any new flies getting stuck.

Now that the gnats seem to be gone there are 2 methods I use to further prevent them from appearing. The first is to bottom feed. Which is where I fill up a container with water and let the plants absorb water from the bottom. This takes about 2 minutes to absorb.

leave the top two inches of soil in my pots dry. So, the gnats have no moist soil to lay eggs on. The second method is the use of fans which make it too inconvenient for gnats to land on the soil.

I can honestly say: I have safely removed these pests forever.

All of my videos recorded since have ZERO pesky gnats flying around.

Comments

  1. I’ve had a small pond in the yard for years. Even with the fountain running the pond would be swarming with gnats and mosquitos. A couple of years ago I started using those Mosquito Tabs and the bugs are almost nonexistent. It doesn’t seem to affect the fish (originally koi, now goldfish), frogs or pond plants at all.

  2. Yates nature’s own caterpillar killer has this very Chem in it and it’s already in powder form a quarter of a teaspoon sprinkled around the surface of the soil in the pots or as a root drench you mix up to ne 10 gram sachet in Luke warm water and let it sit for one hour to activate and it kills larvae on contact I also sprinkle in the drains and other areas where there is moisture and organic matter it really works a treat and it’s cheap

  3. It really makes it so much easier than stirring a container for 6 hours that’s for sure tear the bag empty into a watering can fill with water wait and hour and root drench then either water through or if in Coco dunk in nutrient mix after a water dunk I leave in for an hour just to make sure then I place gnat barrier on top with a very fine layer of medium coarse washed filtered store bought (aquarium shop) sand I’ve watched the gnats push their way through gnat barrier alone but a light dusting of sand is enough to fill the gaps between the pumice stone sorry for the long messages and lack of sentence structure I grow weed I don’t teach English sorry lol

    1. Not available anywhere in the US. Mosquito bits has worked for hundreds of growers I taught and dozens of examples can be seen on my discord.

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