Why does your Begonia Monza Rose 140 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 thrive in the moist, organic-rich soil typical for Begonia Monza Rose. Their larvae feed on decaying organic matter and can damage the delicate root system of the wax begonia.
Excessive moisture in the potting medium creates the perfect breeding ground for fungus gnat larvae. For a Wax Begonia, constant saturation leads to anaerobic conditions that attract these pests.
Begonia Monza Rose is often planted in peat-heavy mixes which provide an abundant food source for pests. The decomposing peat attracts flies looking for a place to lay eggs.
Your plant might also be experiencing one of these issues:
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