# Fungus gnats and almost harvest time **URL:** \ **Category:** Pests\ **Created:** [February 22, 2022, 10:02pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216 "2022-02-22T22:02:56Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![Valk25](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/valk25/32/654040_2.png) [@Valk25](https://ilgmforum.com/u/Valk25)\ **Post date:** [February 22, 2022, 10:02pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/1 "2022-02-22T22:02:56Z")
I’ve been fighting a losing battle against these little buggers, but now it time for war! I’ve tried those yellow stickies and waiting for the soil to be dry before watering, but they won’t quit. I’m at week 6 in flower. What’s the safest, mosquito bits or peroxide? I have a pretty bad infestation, but I don’t want to be smoking chemicals i the end. Any suggestions? ---
**Author:** ![Ickey](https://avatars.discourse-cdn.com/v4/letter/i/43a26b/32.png) [@Ickey](https://ilgmforum.com/u/Ickey)\ **Post date:** [February 22, 2022, 10:22pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/2 "2022-02-22T22:22:43Z")
I have seen a member post about using milk to get rid of them. Claims it is good nutrition for the flowering plants also. I use a dry cal/mag and scratch it in the surface, it seems to keep them from getting a start. My last bag of soil had the added bonus of gnats, but the scratch put an end to them. Also it took me a few grows before I learned how not to overwater. I use a meter and only water when the bottom of the bag starts to show below the middle of the meter. ---
**Author:** ![Spiney\_norman](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/spiney_norman/32/240878_2.png) [@Spiney\_norman](https://ilgmforum.com/u/Spiney_norman)\ **Post date:** [February 22, 2022, 10:28pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/3 "2022-02-22T22:28:51Z")
Mosquito bits are simply a natural bacterium sprayed onto ground up corn cob. The bacteria is lethal to mosquito and fungus gnat larva. I bought a quart sized container about 5 years ago and it still works fine. I treat my rain barrels a few times a year. You need to treat the soil for a couple weeks but it will knock them down. Its not a poison so its safe for your plants. ---
**Author:** ![dirtydave](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/dirtydave/32/626820_2.png) [@dirtydave](https://ilgmforum.com/u/dirtydave)\ **Post date:** [February 22, 2022, 10:31pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/4 "2022-02-22T22:31:08Z")
That would be @yoshi who uses milk after seeing his posts I do that too half a cup of milk per gallon I believe it works sounds crazy but if it works I’m good I heard of milk duds now milk buds ---
**Author:** ![Bluntsmoke](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bluntsmoke/32/1186531_2.png) [@Bluntsmoke](https://ilgmforum.com/u/Bluntsmoke)\ **Post date:** [February 22, 2022, 10:35pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/5 "2022-02-22T22:35:44Z")
Neem sprayed on soil daily along with DE ---
**Author:** ![Billsmetro](https://avatars.discourse-cdn.com/v4/letter/b/a698b9/32.png) [@Billsmetro](https://ilgmforum.com/u/Billsmetro)\ **Post date:** [February 22, 2022, 10:40pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/6 "2022-02-22T22:40:52Z")
I have got rid of them using diluted hydrogen peroxide on the soil. In addition i use diatomaceous earth on top of the soil. Zero infestation since then ---
**Author:** ![Lawnfarmer](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/lawnfarmer/32/645568_2.png) [@Lawnfarmer](https://ilgmforum.com/u/Lawnfarmer)\ **Post date:** [February 22, 2022, 10:59pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/7 "2022-02-22T22:59:15Z")
Cinnamon works ---
**Author:** ![Pheno](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/pheno/32/681325_2.png) [@Pheno](https://ilgmforum.com/u/Pheno)\ **Post date:** [February 22, 2022, 11:43pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/8 "2022-02-22T23:43:32Z")
I herd cooling the room and removing humidity can slow them down … I’m not one to give advice ---
**Author:** ![plumbdand](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/plumbdand/32/515126_2.png) [@plumbdand](https://ilgmforum.com/u/plumbdand)\ **Post date:** [February 23, 2022, 12:49am UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/9 "2022-02-23T00:49:49Z")
Mosquito bits and Captain Jack’s dead bug ---
**Author:** ![DRsDank](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/drsdank/32/628580_2.png) [@DRsDank](https://ilgmforum.com/u/DRsDank)\ **Post date:** [February 23, 2022, 3:00am UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/10 "2022-02-23T03:00:40Z")
> [@Spiney\_norman](#): > > Mosquito bits are simply a natural bacterium sprayed onto ground up corn cob. The bacteria is lethal to mosquito and fungus gnat larva. I bought a quart sized container about 5 years ago and it still works What is the name of what you bought. I don’t have a problem. Just want to get it out there. ---
**Author:** ![beachglass](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/beachglass/32/683364_2.png) [@beachglass](https://ilgmforum.com/u/beachglass)\ **Post date:** [February 23, 2022, 3:02am UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/11 "2022-02-23T03:02:38Z")
Captain Jacks dead bug ---
**Author:** ![OGIncognito](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/ogincognito/32/475294_2.png) [@OGIncognito](https://ilgmforum.com/u/OGIncognito)\ **Post date:** [February 23, 2022, 3:15am UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/12 "2022-02-23T03:15:46Z")
Agree with @Spiney_norman mosquito bits… best thing to kill those little 💩 ---
**Author:** ![1HappyPappy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/1happypappy/32/580108_2.png) [@1HappyPappy](https://ilgmforum.com/u/1HappyPappy)\ **Post date:** [February 23, 2022, 3:31am UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/13 "2022-02-23T03:31:35Z")
Fastest you say? Any bug spray you got, i used some roach and ant spray my last run to nip it in the but. That is if you’re not afraid of chemicals near your weed like some. I spray the tops of the soil till apears just barely damp all over, does not take much. And any fly lands in it is dead period 🤣 ---
**Author:** ![Spiney\_norman](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/spiney_norman/32/240878_2.png) [@Spiney\_norman](https://ilgmforum.com/u/Spiney_norman)\ **Post date:** [February 23, 2022, 1:58pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/14 "2022-02-23T13:58:11Z")
This is what I have > **[Amazon.com: Summit...responsible solutions Mosquito Bits - Quick Kill...](https://www.amazon.com/Summit-responsible-solutions-Mosquito-Bits/dp/B07HCLTXFG?tag=ilovegrowingm-20)** > > Buy Summit...responsible solutions Mosquito Bits - Quick Kill FamilyValue 1Pack (30Ounce): Insect & Pest Repellents - Amazon.com ✓ FREE DELIVERY possible on eligible purchases ---
**Author:** ![Flitme](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/flitme/32/716125_2.png) [@Flitme](https://ilgmforum.com/u/Flitme)\ **Post date:** [February 23, 2022, 2:09pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/15 "2022-02-23T14:09:52Z")
Good Morning @Valk25 I have only had fungus gnats once. I saw where someone said putting sand on top of your soil would help get rid of them. I had some sand left over from my pool filter so I put it on top. I might have just gotten lucky but between that and the sticky traps they were gone. Good Luck and Happy Growing 😊✌ ---
**Author:** ![Highwayman420](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/highwayman420/32/601493_2.png) [@Highwayman420](https://ilgmforum.com/u/Highwayman420)\ **Post date:** [February 23, 2022, 2:16pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/16 "2022-02-23T14:16:35Z")
I second or third Capt Jacks Deadbug and mosquito bits in the soil. You can use Capt Jacks up to harvest, just do a peroxide wash before hanging to dry. ---
**Author:** ![BigItch](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/bigitch/32/522649_2.png) [@BigItch](https://ilgmforum.com/u/BigItch)\ **Post date:** [February 23, 2022, 2:49pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/17 "2022-02-23T14:49:44Z")
Captain jacks is not labeled for fungas gnats. I would try Insecticidal super soap with mosquito bits or Spinosad with some yellow sticky traps for the adults. Sand on the soil also helps… the sand dries much faster than soil so the media is less of an attraction ---
**Author:** ![kellydans](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/kellydans/32/580751_2.png) [@kellydans](https://ilgmforum.com/u/kellydans)\ **Post date:** [February 23, 2022, 3:00pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/18 "2022-02-23T15:00:52Z")
Yeah , those things can be a bummer. Mosquito bits work an home depot has the product on shelf. Good luck ---
**Author:** ![Allinherhead](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/allinherhead/32/525479_2.png) [@Allinherhead](https://ilgmforum.com/u/Allinherhead)\ **Post date:** [February 24, 2022, 5:18pm UTC](https://ilgmforum.com/t/fungus-gnats-and-almost-harvest-time/83216/19 "2022-02-24T17:18:11Z")
I seem to have a constant population of these flying around the base of my grows. I use stickys, and bits. Also usually usemilk. This grow stickys only and im not overrun. As logn as the plants arent being oimpacted by them i havnt gotten overly concerned. Maybe there is such a thing as a healthy population. Im not sure they dont insome way contribute to a healthy rootzone. Just something i thought of when i saw this thread. I havnt done anything in my 6x8 grow about the gnats there.