Against pests in your medium, soil, coconut or hydro.
Against the larvae of the fungus gnat, and in the open ground also against the larvae of the chestnut miner moth, leatherjackets, root flies, centipedes, etc.
Add 5 grams per 10 liter pot, sprinkle on the soil and then water,
Or before filling the pots by mixing the soil / coconut (also 5 grams per 10 liters).
For hydro, hang in a nylon stocking in the nutrient tank.