- 1). Remove dead leaves from the indoor plant's soil to reduce moisture and fungus.
- 2). Allow the top 1 to 2 inches of the houseplant soil to dry out between waterings to decrease the fungus that gnat larvae live on.
- 3). Place yellow sticky cards around the houseplants, such as stuck into the edges of the pots, to trap adult gnats. This prevents the female gnats from laying more eggs.
- 4). Apply an insecticide based on the bacteria Bacillus thuringiensis to the houseplant's soil. Drench the soil with this organic insecticide. According to the New Mexico State University website, this is an organic treatment safe to use around children and pets.
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