As it turns out, Btk (Bacillus thuringiensis kurstaki) is effective
against caterpillars which are insects in the order Lepidoptera (moths
and butterflies).
But when it comes to fungus gnats, the appropriate Bt is Bti (Bacillus
thuringiensis israelensis) which is effective against insects in the
order Diptera (flies, gnats, midges, mosquitoes, and more).
Jean in very soggy Portland, OR
-----Original Message-----
From: Kelly O'Neill <kellyo@wetrock.com>
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Sent: Sun, 29 Jan 2006 07:43:10 -0800
Subject: Re: [pbs] fungus gnats, BT {correction]
Oops, I should have looked at the stuff before posting. THURICIDE is
Bacillus thuringiensis KURSTAKI. I also note, I actually used a Safer
brand
product called Caterpillar Killer (with the same BtK in it). The kind
of fungus
gnats I had, spend part of their life as a worm in the soil eating
things like
plant roots. ...