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Get Rid of Fungus Gnats For Good Using Mosquito Dunks

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    I've noticed that the more cheaper the dirt i get, the more problems with bugs ,and wayward plants growing in the soil. esp when the stock is kept outdoors


      Lots of soil drenches out there. Have had good results with Azatrol as both a foliar and a drench. Root aphids, fungus gnats etc.
      Sola Fide


        For some reason mosquito dunks have never eliminated gnats. A bugbomb at the onset of flower + careful watering seems to be the best method, sand/perlite+diotomites work pretty well too.
        Schools, not prisons. Bread, not bombs.

        'You forge your own chains.'


          can you overdo it with these things? like crushing them up and putting them on top of pure there a such thing as too much? can it hurt the plants at all? can it cause ph or ec issues in the coco?


            skeeter dunks in combo with flypaper did the trick for me


              Does "Gnat off" have the same ingredients?

              I use it and it works, but only if you remember to stay on top of a schedule, otherwise there's always a few coming back.

              My last grow, 16 Critical, dripper fed Coco


                I use 1.5 cups of the Mosquito Bits to a 50 gal rez. I toss it all in a stocking and let it steep for about 10 mins, i move it around a lot. You will see all the stuff coming off of it and it clouds your rez pretty good.

                Then water. Within 48hrs you will have no more larvae. Just keep sticky traps out to catch the rest of the adults.

                Stop overwatering.


                  has anyone ever used adept 25 for gnats?


                    even have my grow store carrying the dunks now


                      just thought i'd throw my bud's experience with Diatomaceous Earth

                      for the record, i'm a newbie watching a bud's grow, figuring i'd learn the "trade" so to speak. My bud is also computer "shy" so i've been doing the research on a couple of aspects, one was the fungus gnats.

                      A few posters in this thread recommend DE, with a few of those indicating to put a 1" layer on top of the soil, so the gnats would have to crawl thru it to burrow into the soil. Well, my bud did exactly that and sure enough the gnats did, and started dying.

                      The problem started when my bud watered the plants a few days later and the DE turned to clay (or clay like) and when it did dry, it was a solid block of hardened clay (when still damp it was like greasy play dough).

                      After about three weeks, just before transplanting before flowering he pulled or scraped all of the DE out that he could. Three to four weeks later, leaves started turning yellow, and the run-off pH was nose diving. He found root rot was the cause and details of that are in another thread.

                      Point here is i don't think layering DE on the soil is the way to go. Interestingly, he tried the #0000 steel wool route and that seemed to help, but the gnats were finding gaps and using those as pathways to the soil. Plus after awhile the steel wool on the lower side of the "apron" was a rusty wet brown mass. Messy to deal with and it gave some concern about creating an iron abundance.

                      What did work, the DE was the Safer Brand, and they claim their DE contains "bait" to draw insects in. I noticed the dusting he'd put down on the tables around the runoff trays was drawing the damn gnats and while some would hesitate to land, others wouldn't and others would run into it (and turn around haul ass out). but once they'd touch'd the stuff, they seem to go into a spiral toward death. It wasn't a couple of weeks without steel wool that the population was way down and now is next to nothing.

                      I did contact Safer Brand as i had some concern about the smokability (or ingestion by humans) and they would not tell me what the "bait" compound was, only stating the DE was "22% not silica dioxide but that they would not reveal the propietary compounds" or words to that effect. So i don't know if the turning into clay was natural for silica dioxide or if the "22%" propietary compounds were the cause.

                      BTW I've since learned there is "food grade" DE available. And his gnat infestation came in with a new bag of FoxFarms happy frog soil.

                      If / when i get a grow room going, think i'll use the safer brand DE on the tables etc, but not on the soil. Maybe some fine river sand layered on the soil but that'll be it



                        Just a heads up for the guys in EU. Amazon uk finally has a dealer that sends dunks across EU for quite cheap shipping.
                        Previously all the dealers would just ship to uk and not outside... Atleast when I tried.
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                          I just got some neem oil to try to treat fungus gnats. Would Mosiquito Dunks be a better option? Any preference for one over the other?


                            Its ok to put dunks on the top soil all the way up through flower right? I'm on week 8 right now(gonna harvest in about 1-2weeks) and wasnt sure if it would hurt anything. Dont think it would from what I've read, but thought I should ask.
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                              dam gnats hard to get rid of even with those dunks


                                Originally posted by VagPuncher View Post
                                Isn't that the same thing as mosquito dunks and bits?