Be very careful that you are using insecticides that are safe for fruits and vegetables.
http://www.livingwithbugs.com/permethrin_pyrethrum.html
How are you using pythium as an insecticide? Can you clarify for us?
http://en.wikipedia.org/wiki/Pythium
I am using the Doktor Doom foggers. They haven't worked, despite my using about a dozen of them at this point. I tossed in a Hot Shot fogger as well (the clean one with no residue), but that didn't work either. at a loss here. really don't know what to do. I am hoping that winter will take care of it. its a sealed room, but i am thinking about pulling in some cold air to try and kill them off. just not sure if the plants would die first or the bugs. i could get it really cold in there though.
go to lowes and buy a hot shot no pest strip for 7 bux.. will cure your problem within a day, and all the egg's within 2 weeks
yeah.. i literally have a half dozen of them in a 12x12 room right now. been in there for a couple of weeks. lots of dead gnats, but i still see some flying around. i had a carbon scrubber on initially and thought this might have reduced the effectiveness of the strips, but have since turned that off for 12 hours a day. still there are bugs.
amazingly, since i have the room sealed, 6 strips, and i can even smell the stuff myself (i hold my breath when going in there, but can defintely tell they are there).
just want to knock these bugs out somehow someway.
as for that foiler spray.. not gonna happen. i can't even reach many of my plants.. so no way could i spray them individually from top to bottom. just not possible.