Extremely resistant fungus gnats, how to kill tried no pest strips, pyrethrin, azamax

So I've been fighting these fungus gnats for about 6 weeks now and now have a super resistant colony. I am only one week into vegging but in the last 3 days the eggs have hatched and can see small adults already. I have used Azamax by spraying down with pressurized nozzle sprayer and soaking the hydroton in azamaz and leaving it in the reservoir for 24 hours. I have also tried putting Mosquito dunks in the reservoir to kill the eggs but I think the water from the drip ring doesn't cover nearly the entire area of the hydroton.

A month ago, I used a Pyrethrin TR bomb which killed all adults and anything crawling around. I had treated with Azamax 5 days after using the Pyrethrin using the same method I mentioned above.

Over the last week, I put in a Hot Shot No Pest Strip (not here to talk about dangers of DDVP) but regardless it has not worked. There are a bunch of them crawling around directly on the NPS so it doesn't seem to have any affect on them.

I am out of ideas now and want to know if anyone has some method they have used to keep these under control and prevent them from doing damage to the roots before it's too late.

FYI, I have two Jack Herer clones in a single WaterFarm module in a 5x5x9 tent with a 600W cooled hood/digital ballast with a carbon scrubber and inline fan. The clones are now 13 weeks old and 2 weeks into flowering.
 

roidrage152

Active Member
Hot shot didn't do much on gnats for me either. I did a combo of dunks, continuous gnatrol, yellow stickies and 2 waterings with nematodes. Took me 2-3 weeks but population is all but gone. I was however venting the room the first time I did the hot shot which I think was a problem. I have hot shots up again for mites, and they seem to be doing the job with the exhaust off.
 

vilify

Well-Known Member
i use go gnats and the strips, and the population is slowly dying after a few sprays

its nowhere near as bad as it used to be.
 

scroglodyte

Well-Known Member
an inch of sharp sand as a mulch. i bet they are not resistant to getting sliced up....lol. not play sand......construction sand. that'll learn'em.
 
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