Why does your Aloe marlothii 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 the potting medium. Their larvae feed on decaying roots and can cause secondary root rot in Aloe marlothii by damaging the sensitive root system.
Excessive moisture in the substrate creates the perfect humid environment for fungus gnat life cycles. For a succulent like Aloe marlothii, constant dampness also leads to anaerobic conditions that rot the thick fleshy roots.
Certain species of small flies are attracted to the nitrogen-rich organic matter in succulent compost. As they lay eggs, the larvae emerge to feed on the fine feeder roots essential for the aloe's nutrient uptake.
Your plant might also be experiencing one of these issues:
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