[Market-farming] Gnats
Kate Halstead
rockyprairie at earthlink.net
Mon Mar 3 16:39:01 EST 2008
Since I grow thousands of plants for retail/wholesale the nematode solution
just isn't practical or cost-effective. What I've ended up doing for many
years is hatching preying mantids in the greenhouse. If you can sync their
hatch date to close to when the gnats start to appear, they are very
effective at taking down the population just about to zero. The
younger/smaller the mantids are the better it seems to work.
Kate
Western Washington
Zone 7
_____
From: market-farming-bounces at lists.ibiblio.org
[mailto:market-farming-bounces at lists.ibiblio.org] On Behalf Of Wiediger,
Alison
Sent: Monday, March 03, 2008 12:57 PM
To: Market Farming
Subject: Re: [Market-farming] Gnats
We tried beneficial nematodes last year on a limited basis and were pleased,
but felt we needed to release more than once. This year we are doing 2
releases a couple of weeks apart. Interestingly, our fungus gnat numbers
seem much lower this year than last, so maybe there was more effect than we
knew AND, we are doing a better job of not overwatering the media on those
gray winter days.
Alison Wiediger, Au Naturel Farm
_____
From: market-farming-bounces at lists.ibiblio.org
[mailto:market-farming-bounces at lists.ibiblio.org] On Behalf Of Andrew R.
King
Sent: Monday, March 03, 2008 2:50 PM
To: 'Market Farming'
Subject: [Market-farming] Gnats
Help! Three weeks ago I saw my fist gnats of the year. By the end of the
first week there were gnats every where. I let my seed trays go dry, then
watered with a BT solution, yellow pie plate covered with tanglefoot were
set out over the benches. By the start of the 2nd week there were even more
gnats if that is possible. I started spraying with pyola but even that has
not helped. Week three the pie plates are covered with gnats but so is my
germination area. Any ideas?
Andy King
Sunflower King's Farm
http://www.sunflowerkingsfarm.com/
PA Zone 6
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