Fungus gnat experiment #569

CarolinaPotheadsNew said:
Thanks for the tip and the photo showing the brand you use. I've had so-so results from crushed Mosquito dunk BTi, but I know your stuff is stronger. Most growers try to say that it's just overwatering that causes them but they obviously don't live near me. They are a plague here. Even bottom watering with fabric bags doesn't stop them. They've gotten much worse the past couple years.
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I do live near you. The BTi doesn't last long in the soil. I use it every watering. 5 drops or more. The soil filters it so my runoff collects and gets the bottom of my fabric pots. Fungus gnats are bastards. I haven't seen any for weeks but new soil brought in a few. They have no way to multiply here. I keep a spray bottle of zymes for any I see and for crawlers on the soil surface. The BTi wipes the larvae out 100% as long as they contact it.
 
Success with my method but with seedling. Im thinking of buying a super large garbage bag to wrap around a pvc diy mini tent. Same concept but its own space with a clip fan on them for pm ipm.

Can do 4 or more seedlings at once if needed and just ease of use. I dont like the lack of air circulation in this. It worked though.
 

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CarolinaPotheadsNew said:
Thanks for the tip and the photo showing the brand you use. I've had so-so results from crushed Mosquito dunk BTi, but I know your stuff is stronger. Most growers try to say that it's just overwatering that causes them but they obviously don't live near me. They are a plague here. Even bottom watering with fabric bags doesn't stop them. They've gotten much worse the past couple years.
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Important to note the ITU rating of BTi products. Some mosquito dunks can be lower strength. I tried WDG3000 which is 3000 ITU and all the fungus gnats got decimated. Even with the low dosage it was extremely effective
 
I used to do a perpetual sog grow, F&D in 6 inch square pots of perlite, vermiculite, and rockwool. The only way I could completely rid myself of them was to bring each pot to the tub, and drench them in spinosad, I used the Monterey brand on amazon. I sprayed every part of the plant, and drenched the medium until runoff out of the bottom of the pot. Same treatment for thrips. I had to do about 100 plants at a time. The good thing is it only took one treatment, because it had a residual effect for at least 2 weeks. Such a pita, but it worked. Now that my perpetual grow is aero, I can't move my plants anymore, so now I can just control them with BTI in the nute solution, along with yellow sticky traps. They are manageable and don't noticeably effect my plants, but I still hate them. The only way to completely rid myself of them now would be to completely shut down and restart. Large perpetual grows are a bitch...
 
Haven’t read the whole thread, so this could be redundant, but I successfully got rid of the fungus gnats during my last grow with an aggressive treatment of BTi drops alternated with watering with mosquito bits. Gone after a few grows where they just wouldn’t go away. Winter might help too.
 
tyler.durden said:
I used to do a perpetual sog grow, F&D in 6 inch square pots of perlite, vermiculite, and rockwool. The only way I could completely rid myself of them was to bring each pot to the tub, and drench them in spinosad, I used the Monterey brand on amazon. I sprayed every part of the plant, and drenched the medium until runoff out of the bottom of the pot. Same treatment for thrips. I had to do about 100 plants at a time. The good thing is it only took one treatment, because it had a residual effect for at least 2 weeks. Such a pita, but it worked. Now that my perpetual grow is aero, I can't move my plants anymore, so now I can just control them with BTI in the nute solution, along with yellow sticky traps. They are manageable and don't noticeably effect my plants, but I still hate them. The only way to completely rid myself of them now would be to completely shut down and restart. Large perpetual grows are a bitch...
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Do you have a preferred BTI product for use in Aero? ✌
 
OneHitDone said:
What application rate have you found to be effective for results?
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Nothing accurate, I just give a little squirt into my 27 gallon rezes, probably about a dozen drops or so twice per week. I wasn't sure it would work along with my other bennies, but it does. I apply it to my 6 gallon veg unit, and to my 2.5 gallon cloner at about 2-3 drops.
 
tyler.durden said:
Nothing accurate, I just give a little squirt into my 27 gallon rezes, probably about a dozen drops or so twice per week. I wasn't sure it would work along with my other bennies, but it does. I apply it to my 6 gallon veg unit, and to my 2.5 gallon cloner at about 2-3 drops.
Click to expand...
Do you have a journal on your aero setup / nutrient / Bennie program?
 
OneHitDone said:
Do you have a journal on your aero setup / nutrient / Bennie program?
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Yes, sir.

Project Mayhem - Tyler Durden's Perpetual Grow

Hey guys. I've been a member here since 2010, and I've learned most of what I know from this site. I started growing in a small one bedroom in Chicago starting in 2010 - I began with RDWC, then switched to flood & drain with great success. I'd throw out my 'hot trash' at 4am in the dumpsters of...
rollitup.org
 
I've been reading a lot positive reviews about nematodes and seen encouraging macro video, they're not terribly expensive.
Enough to treat 15m³ £10 + postage.

With due research I'm sure you'll find them worth a try,
I've read nematodes can drown so check that out too if you're running dwc/aero etc.
 
Update on my bug problems. All the screens and bags have been 100% effective. All bugs eradicated using Capt. Jacks Deadbug Brew. I have not had to spray the leaves in 2 months.

The only gnats I get come from the new soil and are quickly dealt with. Good luck with your BTI :cool:
 
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