Fungus gnats

J

jayme001

Well-Known Member
Hi all just finished my latest grow in soil, and about to start a new hydro set up. Just had a bit of a clean and I no I had a few fungus gnats but didn’t realise how bad. As I said I’ve cleaned the tent and killed and hoovered as far as I can see all of them. Though the odd one does still appear. The question is shall I set up the hydro system, pots, clay pebbles but don’t start the grow yet. My understanding is that they will eventually die/bugger off and I will be gnat free?
 
MickFoster

MickFoster

Well-Known Member
Fungus gnats can only exist in an environment where they can lay their eggs - like in moist soil or coco. What kind of hydro system are you going to use?
 
HydroRed

HydroRed

Well-Known Member
x2 on what @Johnny Lawrence said. I had them before in my drip ring bucket system with hydroton pebbles.
I used concentrated neem oil diluted and applied a few sprays from a spray bottle to the top surface of the hydroton pellets. After a day, I changed the water in the res because it will make it look cloudy or hazy on the surface of the water. Repeated this step and bye bye knats. I did this on a momma plant, but not sure I would recommend this method on flowering plants in hydroponics.
The mix I used was 2 oz concentrated neem oil, 3-4 drops of liquid dish soap (I used Dawn which is non-antibacterial) mixed into 1 gal of luke warm water.
I can see the Gnat Nix being a good fix too. Smother them bastards!
 
J

jayme001

Well-Known Member
I have some neem repel myself that I mixed with warm water but the gits wouldn’t go away. Hopefully by not starting the grow for a week it will naturally get them to leave and then the hydro set up will work. If not I will just have to use neem on the pebbles
 
J

jayme001

Well-Known Member
Now that I’ve cleaned up the room, the odd evil little bastard is flying around other rooms. Does fly spray work on them?
 
dagwood45431

dagwood45431

Well-Known Member
Johnny Lawrence said:
Fungus gnats can thrive in clay pebbles too. It's what I use as a substrate, and I've had battles with them in the past.

A thin layer of Gnat Nix on top is one way to deal with them.
Click to expand...
I ordered a bottle of Tanlin, based on your feedback in an earlier thread and haven't sweated fungus gnats since! A very long overdue thank you!

I just use it every second or third feeding throughout the grow along with a few sticky traps. It's been working great for me.
 
Johnny Lawrence

Johnny Lawrence

Well-Known Member
dagwood45431 said:
I ordered a bottle of Tanlin, based on your feedback in an earlier thread and haven't sweated fungus gnats since! A very long overdue thank you!

I just use it every second or third feeding throughout the grow along with a few sticky traps. It's been working great for me.
Click to expand...
Nice. Yeah, Tanlin and spinosad are 2 things I always have around.

Glad to hear it worked out for you.
 
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