Why does your Athyrium niponicum Silver Falls have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyThe larvae of these flies live in the top layer of organic matter and feed on decaying roots or fungal mycelium. In Japanese Painted Ferns, high humidity and consistently moist substrate create the perfect breeding ground for these pests.
While not the direct cause of the flies, overly saturated soil in Athyrium niponicum attracts fungus gnats. Excessive moisture can also lead to fungal pathogens that serve as a food source for the larvae.
High amounts of uncomposted peat or decomposing mulch in the fern's pot provide a nutrient-rich environment for flies to lay eggs. As this organic matter breaks down, it attracts various small dipteran insects.
Your plant might also be experiencing one of these issues:
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