Why does your Allium porrum Mako Sublim F1 have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The tiny black flies are likely fungus gnats, whose larvae live in the upper layer of soil and feed on organic matter and decaying root tissue. In Allium crops like Leek Mako Sublim, high infestation can lead to secondary fungal infections around the base of the leek.
While the flies themselves are visible, they may be adults of species that lay eggs in the succulent leaves of the leek. The larvae then tunnel through the leaf tissue, creating characteristic white serpentine blotches.
The presence of flies often indicates a substrate that is too moist, which is highly conducive to fungus gnat breeding. For Leek Mako Sublim, excess moisture can lead to bulb rot and attracts pests that thrive in damp organic matter.
Your plant might also be experiencing one of these issues:
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