Gary from Westland, Mi writes
Southern Ag Natural Pyrethrin Concentrate is labeled for gnats. We would suggest that you treat the indoor plants with a product that we have called Bonide Systemic Insecticide Granules. They work great on indoor houseplants for treating this insect and last up to 8 weeks. Please refer to the product label for specific application instructions.
Answer last updated on: 09/14/2015