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Re: Re re Fungus gnats

  • To: Multiple recipients of list AROID-L <aroid-l@mobot.org>
  • Subject: Re: Re re Fungus gnats
  • From: neal foster <nealfost@umich.edu>
  • Date: Wed, 5 Apr 2000 20:45:42 -0500 (CDT)

Isn't there a commercial product called Gnatrol which contains Bacillus
thuringensis and which has been found to be pretty effective against the
larval stage under greenhouse conditions?


at 04:41 PM 04/05/2000 -0500, Bonaventure W Magrys wrote:
>Unfortunately the indoor Ari's soil mix contains peat, cow manure, old orchid
>potting media, ect. They have been growing now at drying conditions but still
>the gnats. Malathion, diazinon, and other sprays/drenches are only temporary,
>cannot do with every watering. Mothballs strategically placed however,
>have been doing the trick. Maybe some cinnamon powder ( good for those
>unfortunate rots - no problem at this time) may also have insect repellant
>Denis <denis@skg.com> on 04/03/2000 06:02:16 PM
>Please respond to aroid-l@mobot.org
>To:  Multiple recipients of list AROID-L <aroid-l@mobot.org>
>cc:  (bcc: Bonaventure W Magrys/ADM/SHU)
>Subject:  Re: Fungus gnats
>Fungus gnats are common in places that stay too moist and damp and have
lots of
>decaying vegetable matter to feed their larvae. Your first course of action
>should be to remove the conditions that are allowing the critters to breed
>thrive, improve santitation under benches etc. If this doesn't help then
go to
>the heavy duty insecticides, Dursban etc.
>Paul Kruse wrote:
>> Fungus gnats not only feed on fungus, but the larvae may also feed on plant
>> roots or even enter plant stems.
>> The following chemicals have been used to control these pests.  Be aware
>> that some chemicals might not be safe for certain plants.
>> Approved for greenhouse and interiorscape use:  chlorpyrifos (Duraguard),
>> diazonon, and  resmethrin.
>> Paul Kruse

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