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Best insecticidal spray for fungus gnats

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    Best insecticidal spray for fungus gnats

    What's the best insecticidal spray for fungus gnats I've been told to use Neem Oil. I'm an organic grower and right now I'm just cooking my soil and noticed this morning I have lots of fungus gnats on the top soil. I don't have plants yet, just soil.

    #2
    One organic option is nofly mycoinsecticide as it utilizes a fungus to combat the pest
    Soil - NFTG #4
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      #3
      I get nematodes plus lots sticky traps. Also covering the soil will help with new bugs getting in.
      640 watt hlg quantum board
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      300 watt mars hydro sp3000
      150 watt hlg quantum board
      100 watt spider farmer led x2
      organic soil with earth dust dry amendments
      Water only i don't check ph
      6 pot fabric autopots with GH trio nutes

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        #4
        I use Gnatrol WDG. Pricey but effective. Usually after one watering they are gone. My honey uses it on her tropical plants and turned me on to it.
        5x5 Gorilla tent
        Spectrum King SK402 - 2× Optic XL1
        Infinity T8 exhaust fan
        Technaflora nutes
        Nectar of the Gods soil

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        • Farmbuck
          Farmbuck commented
          Editing a comment
          Well at least you are using Neem oil like I did.

        • PLreef
          PLreef commented
          Editing a comment
          What do you mean?

        #5
        A drench of Bacillus Thuringiensis Israelensis, (BTI), or an orange oil drench will break the life cycle and keep your soil treated for when you plant. Both completely organic and more effective than neem oil.

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        • Phlash
          Phlash commented
          Editing a comment
          With the bits do you grind them or leave them whole and mix them into the soil, and if the later would this be a good additive to all soil mixes as a preventative for future outbreaks.

        #6
        Phlash, I'm in process of mixing soil and I found a site that has Neem and Karanja cake meal. It is a systemic soil amendment that keeps all kinds of pests away. Fungus gnats, nematodes, spider mites, leaf chewers. It actually suppresses their appetite so they starve to death. Righteous vengeance I think! Build-A-Soil.com, Look for 50/50 Neem/Karanja granules and use 1/2 cup per 7 gal of soil.

        About $20 for 2lbs
        Started 9/9/21: 2nd grow: Hawaii Sativa MAUI auto x 3
        Finished Grow: Critical Mass photo - fem x 3 plus 1 clone same
        Medium: FF Coco Loco plus 30% Perlite in 5 gal cloth bags
        Space: 30x48x62 DIY cabinet lined w/space blankets
        Lighting: Bloomspect SS1000 Quantum board x 3 - 300 watts actual draw total
        Soil Supplements: Worm Castings, Guano, Crab Shell, Oyster Shell, Neem and Karanja Meal, Volcanic Basalt Dust (for minerals), Recharge root micros, ACV for organic pH down as my filtered tap water runs over 7.5 pH
        Ventilation: Vipospar 4" Exhaust Fan w/RH controller, 12" Carbon Scrubber
        Reptile Humidifier/Fogger w/same RH controller, bottom intake fan, 6" heater
        Cabinet on screen porch. N AZ @ 4000 ft.
        Old hippies never go away, they just
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        • Phlash
          Phlash commented
          Editing a comment
          Thanks, I’ll check it out

        #7
        TOKABIGONE go ahead and check out Neemresource.com you can find Neem and Karanja in both forms oil or cake/meal. Compare prices that’s is where Buildasoil gets theirs from. You can find Neem tooth paste, soap, leafs for tea all kinds of Neem products.

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        • TOKABIGONE
          TOKABIGONE commented
          Editing a comment
          Thanks Cali have you used the meal in soil? I kinda found it by accident and what they claim sounds really good for all kinds of critters. At 1/2 cup per 7 gal soil it's gonna take me awhile to use my 2 lbs, lol.

        #8
        Fungus gnats are easily and organically controlled by using sticky yellow "flypaper" available on Amazon for about $12.00 works great. I stick about a half a piece of this on a stick in my tent and it captures almost all of the gnats with no sprays or chemicals. The gnats are attracted to the yellow color. Also the gnats appear if your soil is too damp on the surface. Water completely but less often and that will prevent a reoccurrence.
        Current grow:
        2-Sugar Black Rose, 2-Zkittlez 1-Gorilla Glue Auto
        Soil in 3 gallon pots. Indoors,

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          #9
          TOKABIGONE yes it’s part of my soil mix. It’s the original mix from Buildasoil also known as Clackamas Coot soil mix. I believe in my post of 2019 when I first switched to living soils I posted the recipe. It’s basically just compost preferably worm castings sphagnum peat moss and pumice for aeration that makes your base to that just add 1 cup per cubic feet or 7 gallons of neem/Karanja kelp meal and crustacean meal, for minerals gypsum oyster shell flour and I forgot the last ingredient but it’s that basic. Really works well

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          • TOKABIGONE
            TOKABIGONE commented
            Editing a comment
            Hey Cali, one ingredient you missed was guano or one of them, lol So your soil is pretty much like mine in the important parts. I'm using Coco Loco which has already been mixed with most of the above. It's just coco instead of peat, neither of which provide any nutrition, and perlite not pumice. I added volcanic basalt dust for the minerals as well as 5 more lbs of castings and Loco is light on perlite so I added more. Very similar to Coot soil and I've been finding more people leaning this way as it is a very premium soil mix IMHO! Here's to a happy harvest!

          #10
          Diatomaceous earth (Foodgrade) also is a great organic pesticide . I use it on my vegetable garden and fruit trees. I put it on the soil around my cannabis plants as well

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            #11
            Thank You all very much for you suggestions. But I went to a store that sells everything to grow weed and he highly recommended SNS209 All Natural Systemic Pest Control. 1/2 Tbsp per gallon of water for each of my 5 gallon fabric pots. I also used the Yellow Sticky paper which caught pretty much all the adults flying around so now I just need to kill the larvae down in the soil.

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