Carlos writes
Demand CS is not labeled for fungus gnats. Fungus gnats are present due to overwatering of the plants, so by allowing the soil to properly drain and dry completely, the fungus gnats will eventually die out. You may consider using a systemic insecticide such as Bonide Systemic Granules incorporated into the soil of containerized plants to target the fungus gnat larvae. You can also apply a residual insecticide spray such as Talstar P over the top of the soil of infested plants.
Answer last updated on: 12/10/2020
