Comment by Spagbol

Currently I've been using these to deal with fungus gnats in my indoor plants; they are quite effective, just put one in my watering can, keep the watering can full so it can steep, and water as normal. It kills the larvae in the same way and after about a month I had no more fungus gnat problem (after trying many other things with no success) I do wonder about the eventual mosquito adaption to this if it is employed on a large scale though.