I've had fungus gnats for a long time now and I'm fing SICK of them. I grow in coco and they love that shit. Also just started using fabric pots and they love those even more cause they can hang out on the soft wet surfaces and lay their friggin eggs :(
Seems like every new bag of coco I use, they're in there waiting to hatch. I know that the coco suppliers keep their stock open to the outside world, and they don't sterilize the stuff, so theyll just keep comin back :mad:
I've used BT (Gnatrol) ...that shit does nothing. Seems to make em happier.
I've tried Azatrol root drenches...nada. They hide too well. And esp. the ones on the bottom of the pots...
Hard-core chemicals like Bayer will work for a little while but they also nuke all your beneficials in the media and they can hurt your roots. Not so nice.
Dunks, same story. Nothin.
Go Gnats oil sprayed on the media and pot sides at 2.6 oz/gallon works well (smells nice too, hehe) but there again you're only killin the ones it touches, not the larvae inside the coco.
The search continues......