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Fungal gnat problem! Had an explosion of these guys invade most of my… | Pests, diseases and problems | Planta 커뮤니티

biglooner

Fungal gnat problem! Had an explosion of these guys invade most of my indoor plants. I’ve got glue traps everywhere throughout the house. I’ve tried doing the apple cider vinegar and dish soap in a shallow container. I’ve also done the boiling water down my drains including shower drain. Most recently I’ve been doing mosquito bits soaking in water I use to water the plants in tandem with all of these things. THEY NEVER FULLY DIE. It’s also winter so the mosquito bit treatment has long periods in between since most of my plants don’t need water like that with so little light. I’ve heard people do the hydrogen peroxide cleanup of roots but it’s really difficult for me to repot anything in winter. I have an apt so there’s very little space for such an endeavor especially considering I have well over 20 plants inside. Maybe there’s a more efficient way to use the bits? Any recommendations are greatly appreciated!

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  1. GreenJess

    I wiped all of mine out in 2 months by using a variety of things. I added systemic houseplant insect control granules to all of my plants. You just mix it in the top of the soil. I caved and bought Arber's insecticide and fungicide. I used it to water all of my plants. You can also spray the top of your soil with it if you don't need a complete water. That has lasted months and I still have several treatments left. I also bought mosquito bits and made the tea. I tried that on a group of plants I had already treated a couple of times with Arber and it worked great. I switched to bottom watering my worst plants--I don't know if that made a difference. I started getting gnats after I purchased an aroid soil mix. Since then, I have been treating my soil with mosquito bit tea before using it.

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    • Jenn

      Great system! I agree that it takes MONTHS to fully be rid of them and just have to upkeep

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  2. Forrest

    Fungal Nats are so annoying. I also used a combination of things to help get rid of mine I used been oil, house plant granules for pest control in the soil and the plants where they seem to have infested, the worst, I just went ahead and repotted with new soil. I also saw someone use 70% isopropyl alcohol sprayed at night when there wasn’t any light but I never got to that point.

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  3. jlsKenzy

    I do a few of the things already mentioned, but for me it was diatomaceous earth sprinkled/mixed on the top of the soil that got rid of them.

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  4. IvyPlanter08

    I crushed the bits up in the soil. So when it is time to water they get a good dose every time. Says it lasts roughly about 30 days. I started to use grow queens all purpose fertilizer which has stuff in it to detour fungus gnats also.

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    • Jenn

      I think they do last about 30 days but I’d be careful putting them directly in soil as this can cause moldy soil!

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  5. IvyPlanter08

    Get you some butterworts. They'll eat them up lol

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    • Rhus

      Similarly, I found several very tiny black spiders in and around my plants and saw that they seemed to be catching fungus gnats, so I have been careful not to disturb them 😅

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  6. Rhus

    So, this is a huge pain in the butt, but it's been working for me (along with my previously mentioned tiny spider friends): I apply the mosquito bits tea every day, to every plant, just enough to keep the plants from wilting but not enough for a good watering. The plants don't love it, and their growth has certainly slowed a little, but getting the top few cm of soil daily for a while has finally been what's made a real difference. Next time I am just getting the dang nematodes though, because it is a huge pain to treat every plant every day. Ain't nobody got time for that

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  7. Dondoo52

    Systemic crystals also worked well for me in eliminating fungal gnats.

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  8. IvyPlanter08

    You can also top dress with lava rock too

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