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Story summary
- Fungus gnats are a common pest of houseplants and can appear unexpectedly.
- A popular remedy uses crushed eggshells to deter egg-laying and add nutrients, but the barrier fails because shells vary in size.
- The method also ignores the underlying issue of damp compost that attracts gnats.
- To reduce their presence, gardeners should dry the soil surface, trap adult gnats, and address the damp root cause.
