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Old 04-23-2016, 04:55 PM #31
master shake
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I had a battle with these bastards in my last grow/current mother plants. Finally got something that works great and isn't full of pesticides/chems - a wine trap!

Simply take some red wine (cider vinegar works too I read), pour into a shallow and wide dish, and stir in a little bit of dish soap. The wine and vinegar attract the gnats and when they land on the surface, they can't get out due to the surface tension of the water being broken from the soap. Place the dish under the canopy, and leave it for at least a week or 2, or for good since it seems like they always come back this time of year. Add a little water every couple days as it evaporates.

This works for fruit flies too, and I found out it works for fungus gnats too!

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Old 04-26-2016, 06:23 AM #32
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Quote:
Originally Posted by master shake View Post
I had a battle with these bastards in my last grow/current mother plants. Finally got something that works great and isn't full of pesticides/chems - a wine trap!

Simply take some red wine (cider vinegar works too I read), pour into a shallow and wide dish, and stir in a little bit of dish soap. The wine and vinegar attract the gnats and when they land on the surface, they can't get out due to the surface tension of the water being broken from the soap. Place the dish under the canopy, and leave it for at least a week or 2, or for good since it seems like they always come back this time of year. Add a little water every couple days as it evaporates.

This works for fruit flies too, and I found out it works for fungus gnats too!

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This is great.. Saw a few and put up yellow traps.. Trying this tomorrow.. Thank you for sharing
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Old 05-02-2018, 05:48 PM #33
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Have any of you guys tried top dressing your coco pots with diatomaceous earth? I am planning on throwing my drip rings underneath the layer of DE. will this cause any issues?
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Old 05-02-2018, 08:06 PM #34
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It has to be dry to be effective.

Gnatrol works well.
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Old 05-04-2018, 02:47 PM #35
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I read somewhere that a spinosad drench works well. Anyone have experience with that?
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Old 05-05-2018, 12:02 AM #36
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And a layer of dryer sheets on the soil surface will prevent infestation.
Have not had one fungus gnat for years now.
Dirt cheap, non-toxic, and very effective.
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Old 05-05-2018, 01:31 AM #37
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Try doing a root drench with GoGnats. the stuff smells great also
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Old 05-05-2018, 01:33 AM #38
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and the sticky papers above your medium of course
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Old 05-06-2018, 10:08 PM #39
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I just had them back again...
Since Neudorff doesn't make the liquid BTI solution anymore I had to go with mosquito dunks. It seems to have worked, the last adults are getting sorted by the yellow sticky paper, but has anyone ever thought about if the toxins from the the dunks, GoGnats etc might be taken up by the plant ?
I have used BTI many times, but just thought about the fact that the effect is based on toxins after all, the Bacterae Thuringensis Israelensis toxins...
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Old 05-07-2018, 12:55 AM #40
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Gnatrol works well.
Indeed it does. It was developed to control gnats in greenhouses. I found complete eradication to be impossible in my organic soil grow but gnatrol wdg really whups their bug junkie asses at 1 tbsp/gal & enough solution to thoroughly wet the top inch of soil. Apply 3 times a week apart. It works best when I use it before I even see any flyers. I just mix it into ewc tea.

https://www.valent.com/professional/...trol/index.cfm
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