Fungus Gnats

Hey I spotted a couple fungus gnats around my seedlings. Can any of you guys recommend a way to help stop and prevent them?
I’m thinking of grabbing beneficial nematodes to stop the larvae but what can I use to stop the adult gnats?
Also can the gnats damage my seedlings they just breached the soil not to long ago please help!

I'm new to indoor my self but diatomaceous earth will kill them on the surface but not there eggs below the surface. There is quite a few products that will work in the soil.

My understanding is your soil may be a bit to wet. Try drying it out. For me its a bit tougher because I use blumats to water so I do not have a dry period. Someone with more experience will jump on I'm sure. I had them too but not enough to bother the yeild/harvest. Good to get them under control though.
Good Luck

Sticky traps, potato slice on top of soil to attract the larvae and then remove slice, apple cider vinegar in a cup with a drop of soap, slap the pots and squish what flies out, vaseline on edges of pot,

They killed a lot of my seedlings I assume by eating the roots but I'm no scientist, also heard they can spread disease to plants.

If the seedlings are small, put them in a ziplocker, this will trap the gnats when they fly out, then you can see them and squish them through the baggie

gnat lives matter - not

Yeh some folk say to not water from the top also, so bottom feed

Top dress with EWC.

PadawanWarrior said:

Top dress with EWC.

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Can you explain to me how this would kill them off?

BTI based products like Gnatrol, Mosquito dunks or Microbe Lift BMC (most bang for your buck I think)

I did kind of keep the seedlings a little moist, I put a fan on them to dry a little quicker.
And thanks guy I’ll definitely try some of these methods.

TJ_BASS said:

Can you explain to me how this would kill them off?

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EWC should have some hypoaspis miles predatory mites. Fungus gnats are their favorite food. I top dressed my original FFOF with Wiggle Worm EWC my first round. I haven't seen a gnat in over a year and a half now and I've been using the same soil, it's just been turned into no-till.

@Renfro always has good advice too.

PadawanWarrior said:

EWC should have some hypoaspis miles predatory mites. Fungus gnats are their favorite food. I top dressed my original FFOF with Wiggle Worm EWC my first round. I haven't seen a gnat in over a year and a half now and I've been using the same soil, it's just been turned into no-till.

@Renfro always has good advice too.

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Interesting, I keep seeing a few gnats still flying around. I have some EWC in a bag I bought. Will this cause a nute burn if I already fed with liquid nutes?

inth3shadowz said:

Interesting, I keep seeing a few gnats still flying around. I have some EWC in a bag I bought. Will this cause a nute burn if I already fed with liquid nutes?

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EWC are really mild. You won't burn anything. Top dress away. A 2" layer would be good if you have the space in the pot.

Then throw a couple yellow sticky traps in there to catch the fliers.

There's also nematodes, bacteria and other good shit in EWC. The vermicompost that I use now from Build a Soil also has rove beetles and springtails in it.

This is a good link about organic ways to get rid of them.

Renfro said:

BTI based products like Gnatrol, Mosquito dunks or Microbe Lift BMC (most bang for your buck I think)

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Here is your answer . I couldnt think of it.

I put up yellow sticky traps And will be top dressing with ewc!

I'm trying the potato thing out of curiosity, will get back to you when potatoes start growing

spliffendz said:

I'm trying the potato thing out of curiosity, will get back to you when potatoes start growing

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So, I just wanted to come back to this thread and say, the only way I was able to see a decrease in the gnats was to actually top layer with about an inch of sand. I've only seen 1 since. Before, I could hit the pot and theyd fly out. Im hoping slowly they'll suffocate and die! lol

inth3shadowz said:

So, I just wanted to come back to this thread and say, the only way I was able to see a decrease in the gnats was to actually top layer with about an inch of sand. I've only seen 1 since. Before, I could hit the pot and theyd fly out. Im hoping slowly they'll suffocate and die! lol

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Did you try the EWC thing?

PadawanWarrior said:

Did you try the EWC thing?

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I did...waited about 3-4 days to see if it improved and unfortunately didnt see much difference. Im sure if I waited another week or so, id see the benefits, but I just wanted them gone NOW lol

I've had them come out the bottom and the top, the potato thing was absolute rubbish