@ Max, if I was sure there was heavy infestation of gnat larvae, I would knock off most of the old soil when potting up. Maybe spray the roots area with a Neem solution. I know this will set the plant back, but it would be better than re-inserting the gnat larvae in the new container. Also, I'm not sure about using the dunk pellets in the soil itself as you described. It seems like it would work, but it is designed (I think) to be used as a liquid drench.
yeah, I keep checking downstairs I think I killed the majority of them, I went 3 weeks without watering the plants (after I switched soil mixes that was heavier than the previous one I had, and I had just potted up) to wait for them to dry out, and the roots took off, and I think a huge amount of the fungus gnats died as well.. I see a few in the "cool tube" of the light that get fried, but no where as close to the number I had before, I know they are around, but I don't see any flying around which is good. oh and I had bought a soap spray for gnats and stuff, which I used in a few days spraying everything I saw lol.. that worked pretty well, but it's really hard going through 80 plants really well, but luckily I think if I stick to the strips and go back to using the BTI dunks, I should be good
and as far as the dunks go I have these http://www.amazon.co...e/dp/B0071E531Y (wow I just realized how expensive they are on amazon.. these were cheaper than the actual mosquito dunks at Agway, which is why I got these instead.) and since they cover a huge amount of water, like small ponds and stuff, I just sprinkle a little amount in the bucket each time I water, but even when I let it sit for a day or so, I still see a lot of little pellet/grains in there, and I know a good number dissolved in the water... but it's just hard to think more didn't dissolve.. I should fill my water bucket up tomorrow and put the stuff in there for my watering on friday, 1 day of soaking might not be enough
Edited by Maxsack331, 25 March 2012 - 09:01 PM.