Why does your Anthurium andraeanum Sierra Orange have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The larvae of these flies thrive in the organic matter of damp potting soil, feeding on decaying roots and fungal mycelium. In Anthuriums, frequent moisture required for their high humidity needs often creates the perfect breeding ground.
Excessive moisture in the substrate leads to anaerobic conditions and root decay, which releases nutrients that attract scavengers like fungus gnats. This creates a feedback loop where rot attracts more flies.
Old, dying Anthurium leaves left sitting on the soil surface provide an ideal food source and egg-laying site for flies. The decomposition process attracts various species of small dipterans.
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