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- From: "MARGARET LAUTERBACH" <melauter123@msn.com>
- To: "gardenwriters-on-gardening" <gwl-g@lists.ibiblio.org>
- Subject: Fungus gnat control, was Re: [gwl-g] Feverfew
- Date: Tue, 1 Mar 2005 04:51:53 -0700
Betty, fungus gnats don't lay eggs in sand or gravel. If you top off your
pots with coarse sand, you'll begin to control the fungus gnats. Greenhouses
use this control because BT is too expensive and labor intensive for
thousands of potted plants. Margaret Lauterbach
----- Original Message -----
From: "bbmackey" <bbmackey@prodigy.net>
To: "gardenwriters-on-gardening" <gwl-g@lists.ibiblio.org>
Sent: Monday, February 28, 2005 3:51 PM
Subject: Re: [gwl-g] Feverfew
> Well, Andrew, I think the gnats are coming out of my own compost. This
> particular set of lights is isolated in the basement and I use it to force
> some of my garden plants and winter over some others. I do a little seed
> raising down there too but the conditions are not all that clean because
> of
> the garden plants.
>
> I have never heard of shore flies and have not made a definitive id, just
> assumed they were the common fungus gnats. I suspect the gnats are landing
> on the pollen-laden flowers, but some pollen must reach the soil also.
>
> Whatever the little critters are, they are the same as I have had other
> years but they have not multiplied this year and may even have died out. I
> haven't changed anything else and water with plain tap water.
>
> This year I tried forcing some Phlox stolonifera for a trough demo I plan
> to
> do -- dug up in early January, it came into flower in one month flat! I
> had
> to start a second batch, for the demo is on March 6.
>
> Melanie, thanks for the cinnamon tip!
>
> Stay warm!
>
> Betty Mackey
> www.mackeybooks.com
>
> ----- Original Message -----
> From: Hamptongar@aol.com
> I'm wondering why the fungus gnats show up every February and where
> they're
> coming from. I guess it's possible that the feverfew is suppressing the
> gnat population but one key question is if it's effecting their
> reproduction
> or if you have some other cultural change that's effecting the gnat
> population. Are you watering with something different? Is the pollen
> reaching the soil? The gnats lay their eggs in the soil and that's where
> the larvae develop. Have you seen any signs of the tiny, nearly clear
> larvae at the soil surface? Do you use yellow sticky traps to monitor?
> Are
> you certain they are fungus gnats and not shore flies?
>
>
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- Fungus gnat control, was Re: [gwl-g] Feverfew, MARGARET LAUTERBACH, 03/01/2005
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