Re re Fungus gnats

From: "Bonaventure W Magrys" magrysbo at shu.edu> on 2000.04.05 at 21:41:06(4344) 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, recently have been doing the trick. Maybe some cinnamon powder ( good for those unfortunate rots - no problem at this time) may also have insect repellant properties. Bonaventure +More Denis on 04/03/2000 06:02:16 PM Please respond to aroid-l@mobot.org To: Multiple recipients of list AROID-L 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 and 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

From: neal foster nealfost at umich.edu> on 2000.04.06 at 01:45:42(4345) 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? --Neal +More ---------------------------------------------------------------------------- --- 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, recently >have been doing the trick. Maybe some cinnamon powder ( good for those >unfortunate rots - no problem at this time) may also have insect repellant >properties. >Bonaventure > >Denis on 04/03/2000 06:02:16 PM >Please respond to aroid-l@mobot.org > > > >To: Multiple recipients of list AROID-L >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 and >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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