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Fungus gnats

CastlesMadeOfSand
CastlesMadeOfSandstarted grow question 3 years ago
I have a problem: gnats. I have noticed that the larvae are eating my roots for this reason the leaves are burning,one has already fallen i tried to water with neem oil and soap but don't believe this kills the larvae. what can I do? recommend some product or home remedies
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InspireMe
InspireMeanswered grow question 3 years ago
Hi mate, no problem! yes you can use 6% just dilute it a little more. So mix 1 part H2O2 to 8 parts of water. That will create the same strength mix. If it were me I'd use it once a week. But due to it being diluted in sure you could use it more than that, people run it in their dwc 24/7. I just like to do things as safe as possible.
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MrStinky
MrStinkyanswered grow question 3 years ago
I had the same thing. Get beneficial nematodes SF and put a tiny amount in a glass of water, dissolve the powder (eggs) and water in. Then add a top dressing of diatomaceous earth. Should be 100% gone within a week or so.
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CastlesMadeOfSand
CastlesMadeOfSandanswered grow question 3 years ago
Never heard of Ec levels until now,my fault.. I think i not able to check the ec levels... How i can manage to keep this parameter low, maybe change the water i use.. So for you gnants are not the problem here
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JUNGLE_B4RNS
JUNGLE_B4RNSanswered grow question 3 years ago
Fungus gnats will never harm your plant. This burned leave is a typical symptom of high EC level in the soil. Cannabis is one of the fastest growing weed, the growth rate of the roots is impressive and 10 x higher than what a lil larvae can eat. The only damage they can cause is to get stuck on the buds like on sticky pads, your buds getting all recovered and full of bugs... First check the EC level of your soil. Then you just need to apply some diatomaceous earth or sand or straws on top of the soil with yellow sticky pads to refrain the invasion.
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Organoman
Organomananswered grow question 3 years ago
Stronger solution does not make a stronger killer, just a higher risk of something going wrong. Recommended dilution rates have been derived at through extensive research, not following the instructions can lead to problems and won't make the gnats any deader than dead. One application should be enough, but a follow up dose/doses may be needed, just keep a close eye out for new gnats. You might have to apply weekly doses until no more gnats are found. Try to let your soil dry out between watering, only re-watering when the top 2-3cm have dried out, this will discourage the gnats, they like a constant wet and damp conditions to survive. If you have been watering too often, this will be heaven for the gnats. Hope this helps, Organoman.
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CastlesMadeOfSand
CastlesMadeOfSandanswered grow question 3 years ago
thank you very much ! luckily I already have oxygenated water at home so it's perfect ... can it work even if it has higher percentages? 5-6% obviously I will decrease the quantity ... for a liter of solution a 150 ml glass is fine?. how many times do I repeat this procedure ?thanks I feel a little more calm now that I know what to do you are of great help Thank tiu very much
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InspireMe
InspireMeanswered grow question 3 years ago
Hi mate, Hydrogen peroxide reportedly kills fungus gnat eggs, larvae, pupae, and adult flies on contact. Neem oil doesnt actually kill them, they just dont like it. be sure you’re using the typical 3% household hydrogen peroxide, not the industrial-strength stuff! Dilute it down slightly and mix 1 part 3% hydrogen peroxide to 4 parts water (e.g. 1 cup peroxide and 4 cups water). Allow the soil to dry slightly before application. Then, either spray the surface of the soil thoroughly until it saturates down a couple of inches. Or, for a deeper and more effective treatment, water the entire plant with it – soaking all of the soil. It will fizz and foam, which is totally normal. It quickly breaks down into molecules of water and oxygen. Hope this helps 🙂
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