Traditionally used outdoors to kill mosquitos in still water, you can steep these in your watering can and water your plants as usual.
The fungus gnat larvae eat the bacterium in the dunk, then die. This only kills the larvae, not the adults (flies). Yellow double sided sticky tape can be used for adult fungus gnats. The sheets are water resistant. They last a long time, so no need to replace them often. Fungus Gnats are naturally outside, in new plants, and in new bags of soil, so it's difficult to avoid them. By using the treated water, an infestation cannot start up.
Directions for use:
- Place 1 dunk in watering can.
- Fill with water.
- Allow to steep for an hour for cold water and 20 minutes for warm water.
- Allow water to return to room temperature before using.
- Use every time you water for a minimum of a month to kill you fungus gnats at every stage in their life cycle.