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Persistent Fungus Gnats: Advanced Control

Scrape off top 1–2 inches of soil, top-dress with sand or diatomaceous earth. Dry plants to near-wilt. Use potato slices to trap larvae. For quick fix, soil-drench with imidacloprid (Merit/Marathon). Don't replace all soil—too traumatic. Pro-Mix is a good sterile mix for future repots.

House Plants: Fungus Gnat Control: Why Drying Soil Works Best; Fungus Gnats: Eliminate the Source, Not Just the Adults; Fungus Gnat Control: Drying Out Soil Is Key; Fungus Gnats Killing Plants: Larvae Control Guide; Fungus Gnats on Croton: Non‑Chemical Control; Ficus with Fungus Gnats and Worms; Fungus Gnats on Bonsai: Overwatering Is the Real Problem; Eliminating Fungus Gnats: Identification, Treatment, and Prevention; Fungus Gnats on Indoor Hibiscus: Same Fix, Different Plant; Peace Lily Fungus Gnats & Brown Tips: Separate Issues

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