Why does your Begonia boliviensis 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 breed in the moist organic matter of Begonia boliviensis soil. Their larvae feed on decaying plant material and can damage delicate Begonia root systems.
Begonia boliviensis prefers consistent moisture but is highly susceptible to fungal growth if soil remains waterlogged. This high humidity in the topsoil layer creates the ideal breeding ground for fungus gnat larvae.
Accumulated dead leaves or decomposing peat moss at the base of the Bolivian Begonia provide nutrients for larvae. As these organic materials break down, they attract pests that thrive on decomposition.
Your plant might also be experiencing one of these issues:
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