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Fungus Gnats

Size: 2–3mm

Identification, life cycle, damage signs, and treatment guide.

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Identification

Small dark flies hovering around soil. Larvae are white maggots with black head in top inch of soil.

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Life Cycle

Adults live 1 week. Larvae develop in moist soil over 2–3 weeks. Year-round indoors.

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Damage Signs

Larvae eat roots and fungal matter, stunting growth. Adults are mainly a nuisance.

healing

Treatment

Allow soil to dry between waterings. Yellow sticky traps for adults. Neem oil drench for larvae. Beneficial nematodes.

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Prevention

Avoid overwatering. Cover drainage holes with mesh. Allow soil surface to dry.

Fungus Gnats — Plant Pest Identification & Control | GreenScout