Why does your Anthurium andraeanum Aristo have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The tiny black flies are likely fungus gnat adults, which lay eggs in the top layer of organic matter. Their larvae feed on the organic material and fine root hairs of your Anthurium, potentially causing root damage if populations explode.
High moisture levels in the Anthurium's substrate promote the growth of fungi and mold, which serve as the primary food source for fungus gnat larvae. Frequent watering keeps the top layer of the medium perpetually damp, attracting these flies.
While not the direct cause of the flies, a lack of nitrogen can lead to weakened plant tissue and slower drying times in the soil, creating a more hospitable environment for pests. This secondary effect makes the plant more susceptible to infestation.
Your plant might also be experiencing one of these issues:
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