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Thread: Fungus Gnats

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    PeaceCarny's Avatar
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    Fungus Gnats

    Very recently, I've seen that some fungus gnats have been popping out of one of me D. capensis pots and I don't really mind it, but I see a couple of new ones every day. Would you guys consider this something to be concerned about, because if there is a BIG amount of larvae beneath the soil, I definitely don't want them to mess up my plant's roots.

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    Hello, I must be going... Not a Number's Avatar
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    Yes, the larvae can feed on the roots. The larger the infestation the greater the likelihood of that happening.

    Some people consider fungus gnats as harmless and at most a nuisance from the adults flying around if indoors. Many states Agriculture Departments have reconsidered fungus gnats as a serious problem causing much crop damage.

    The easiest method I've found to control them is to use sticky traps to capture as many adults as possible. And to treat the soil with Bacillus thuringiensis ssp israelensis (Bti). Bti will slowly kill the larvae. If you treat long enough to cover all the possible generations in your pot you'll be fungus gnat free until it gets reinfested.

    Bti is readily available in stores as Mosquito Dunks or Mosquito Control by Bayer Advanced. Just add a little to some water and water your pots with it or break off a chunk (if using Dunks) and put it in your water tray.

    Since it is a bacteria take care to wash your hands thoroughly before touching you eyes or mouth.

    In the mean while, let your Sundews have a good feed.
    Grand Hotel... always the same. People come, people go. Nothing ever happens.

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    --Freedom Czar-- Fryster's Avatar
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    Yeah, your dews will readily take care of any flying adult gnats. They're the perfect size for most dews to capture and consume.
    Only a moral and virtuous people are capable of freedom; the more corrupt and vicious a people becomes, the more it has need of masters. -- Benjamin Franklin

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    mark.ca's Avatar
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    Never had a problem with them on dews...the plants will control them by feeding on them.
    If they get to some seeds pots them it can be trouble...the very small plants can be affected by the root damage made by the larvae.
    Best regards,
    Marius

    My Website: http://droseragemmae.com/

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    PeaceCarny's Avatar
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    Well there is a relatively young plant in the pot. It's only about a month old but it's grown a lot ever since I gave it more light and fed it some springtails.

    Here it was a couple of weeks ago.

    Photobucket

    And now

    Photobucket

    Photobucket

    Yummy : ]

    Photobucket

    Think I should change its soil just to be safe?

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    i treated my fungus gnat problem with bon neem (neem oi) and it seemed to work if applied multiple times . I think it took me about 2 or 3 applications once a week to clear it up. So far there have been no signs of fungus gnats its been about 1 or 2 months so far

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    mark.ca's Avatar
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    You can change the soil as may times you want...the "problem" will appear again. If you give your plant good conditions it will grow well no matter what the larvae do to it.
    Best regards,
    Marius

    My Website: http://droseragemmae.com/

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    PeaceCarny's Avatar
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    Quote Originally Posted by mark.ca View Post
    You can change the soil as may times you want...the "problem" will appear again. If you give your plant good conditions it will grow well no matter what the larvae do to it.
    Well it is growing REALLY fast; two new leaves are springing up and I get new a trap about every 4-7 days : ] I'm still finding some fungus gnats in its pot, but I"m only finding them in the top layer of LFS. I bet this is where most of the activity is, with a few gnats maybe under the actual soil surface. I'm not caring much for it anymore. I used to see em' flying lots o' times into my baby D. capensis, but now there are none getting caught, but there's still a sufficient amount left to feed my sundew. Most of them are actually dropping into my water trays and drowning there! xD LAWL

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