Works very well against fungus gnats

We had a strong infestation of fungus gnats in two large potted plants that are in the summer with us on the terrace. Already after the first pouring no more fungus gnats were seen after about 3 days. Since the larvae of the next generation to be destroyed, we have repeated the treatment in accordance with the instructions on the casting after a week. We have also attached sticky yellow panels cut into strips at the edge of the pot. The fungus gnats are gone after 2 weeks treatment with the next generation. Just as it should be.