Fungus Gnat Larva

Natural Habitat

Damp soil high in organic matter, greenhouses, houseplants, and moist environments with decaying plant material or fungi.

Diet & Feeding

Mostly feeds on fungi, algae, and organic mulch, but can feed on delicate plant roots or root hairs, especially in large numbers.

Behavior Patterns

Larvae are semi-transparent with a distinct black head capsule; they prefer moist conditions and go through four larval stages (instars) before pupating in the soil.

Risks & Benefits

Benefits include aiding in the decomposition of organic matter; risks include damaging plant root systems and acting as a vector for plant pathogens like Pythium or Fusarium.

Identified on: 2/24/2026