Quote Originally Posted by coolslayer
That's all well and good,but if you leave ANY of the adults alive,they will lay eggs and the larvae will eat your roots,which could end badly with a dead plant or dead plants.

Hmm... Well, I guess that I have been extremely lucky. I always have a few flies by the second planting in the same soil, but they rarely get bad enough to treat by harvest. No dying plants, and roots all kinds so things are working.

Fungus, and gnats, would probably thrive in organic soil more? What kind of soil do they grow in best?

How about a plastic covering over your soil? Maybe just a sheet of that yellow cellophane with a slot for the stem. Might get by with no poison at all?