Be careful with that Neopermin , it has neurotoxicity in humans … I use similar products like Delta Dust for crack and crevice for residential / commercial jobs . Plant will not uptake it , but surface areas of soil will bind to it. It will kill fungus gnats and a few other broad spectrum pests .
Make sure your plant watering isn’t over done as adults attract to moist conditions … leading to them birthing larval forms that will attack roots.
Some simple top cover materials can be added such as horticultural sand as a physical barrier , sticky’s for adults also. Worse case problems can be resolved with bottom watering techniques to. Just be careful of hazards associated with “ powders “ and contact.
Deltamethrin is the active , but will be available under various maker names.