Help fungus gnats

I have 6 plants in my flower room and these little bastards showed up I have adequate air flow from my oscillating fan so they aren't flying around they are hiding under the buckets in the drain pan. How and what is the best and cost effective way to safely remove or maintain this infestation?

I just use sticky traps/ fly ribbons. I eliminated 200 gnats in a week. It keeps the infestation manageable.
Keep your whole area free of trash/ dead leaf matter; gnats live in old food and they love decaying fruit.
If you see less than 10 gnats in a hour then your should be ok. Any more than 10 in an hour then use more fly ribbons and clean better.

I use neem cake as a top feed watering it in. Within a week they are gone. Hits them on a hormonal level

Thank you sir I'll check into that today at the hydroponics store it's first time using my what used to be veg/flower room now just flower since I put the vegroom in..

I dunno if fly traps will work with the fan going they seem to be staying under the pots in the drain pans and crawling up the stalk of my ladies no noticeable damage other than a few leafs.

These are put on a stake and then put inches from the topsoil.
Here is the link on amazon. https://www.amazon.com/JTHM-Dual-sided-Whitefly-Mosquitoes-Insects/dp/B01G8XE4D6/ref=sr_1_7?ie=UTF8&qid=1469477142&sr=8-7&keywords=plant+sticky+traps

the gnats are in your soil eating your roots. You put them near the soil.

neem oil also works

Awesome I'll check it out today have to do something soon one L.S.D looks like it wants to go out back and shoot itself

Just picked this up from the hydroponics store the guy working said it will eliminate most if not all of the problem as a additive to the nutrients and as a spray

My hydro grows always have a few fungus gnats. They came with the botanic are coco, all for free. Lucky me.

They don't really do all that much to mature plants unless it is a literal infestation and even then, they can be taken care of. First, what is the setup? Is it dwc or something else? I have to let the coco completely dry at the top. I have been told, but have never tried, a layer of sand at the top or something that dries out very easily. If the top remaining wet is the issue, sand should work.

My issues is the dwc arise when I let the water level climb and keep the coco saturated. Dropping it below the net pots solves that. There is also gnatrol, bacillus thurengiensis, and it eliminates them. Frankly, I ignore them, but I never really see flying gnats.

ya as jane has said, unless you let them get really out of hand they wont do much damage. I had them for an entire flowering cycle one time flying around and didnt even notice an effect on the plants. Make sure they are in fact gnats and not root aphids if they r causing dmg to your plant and not flying.

purplehays1 said:

ya as jane has said, unless you let them get really out of hand they wont do much damage. I had them for an entire flowering cycle one time flying around and didnt even notice an effect on the plants. Make sure they are in fact gnats and not root aphids if they r causing dmg to your plant and not flying.

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I had them the whole first grow and also did not run into any problems. I just find them annoying, so I lay out a few fly traps.

guardiangk said:

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DO NOT USE THESE ON FLOWERING PLANTS IF U HAVE ANY OPTION AT ALL. FUNGUS GNATS ARE HARDLY WORTH USING POISONS THAT MAY OR MAY NOT BE HARMFUL TO PEOPLE AROUND THE PLANTS AND WHO USE THE END PRODUCT.

This product is not ment to be used in inhabited areas. It is a poison and using it on plants meant for human consumption is unethical and irresponsible.

Also they r not very effective unless you have a system where u can cut off the exit fans for a few hours every day. If you live anywhere near your plants please do not use this product. That being said it is highly effective vs almost all forms of pest and can be used during veg as long as u thoroughly ventilate the room before you enter.

Mosquito dunks F.T.W

These are so easy to prevent from ever being an issue in anyone's garden with no chems.. Plants that are already infested will take a bit longer to die off. Once they cant lay anymore eggs they will die off.. Gnats and thrips need a consistently moist medium to breed. After you water dont leave standing water in your drip pan. Use a stick to fluff the top 2" of medium so it drys out fast. Once the top layer is dry Gnats or thrips will not go into medium to breed in. U must be consistent in doing this. If your medium drys out quick ea day then you do not need to do this. Having a dry top layer is key. Our plants top layer drys out between ea feeding so we no longer need to fluff. Once you find out how much water to use so this happens your set. Its as easy as that.. We have not seen these in years since we started doing this. This works perfectly in soil. If your using coco you might need to fluff as coco needs to be moist all the time.

Try this it works good luck ..

It is dtw using roots organic original soil they are gnats just hiding under the pots in the drain pans and all up in the soil I got this gognats and 2 days later noticed a huge difference and the ones under the pots are almost nonexistent ty to everyone for your input and help

For years and years and years - My go to gnat killer...

Microlift BMC

https://4hydroponics.com/microbe-lift-bmc-2-oz

Alsystin®, in powder form i mix it @ double recommended dosage with water to not only rid fungas gnats but also termites in my outdoor grow area with no negative effect on plants

Whenever it comes to gnats and spider mites etc, along with powdery mildew, my go to is always onyx spider mite killer because its super safe and can be use through harvest. Its very effective and makes a shit ton of solution for very low cost.

theres this glass looking sand you can put on the top if your in soil. helps keep the larva from coming out. and hydrogen peroxide works well. Im in dwc, recently had a very small population, just squirted the roots down real quick with a bottle of 3% and iv always had traps up. been over a week havnt seen any more. i also poured in a bit of neem extract into the water, that could have helped too.