Why does your Onion Galatea F1 have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The larvae of these flies live in the soil and feed on organic matter or fine root hairs, which can damage the developing bulb of Galatea onions. The adults are attracted to the moist, organic-rich soil typically used for onion cultivation.
While not 'flies' themselves, certain soil-dwelling pests or decaying onion matter can attract various Diptera species. If the Galatea bulbs are rotting due to overwatering, the fermentation process attracts flies looking for a moisture source.
If there is unburied compost or decomposing organic mulch near your onion bed, these flies may be present in the area without directly attacking the Galatea crop.
Your plant might also be experiencing one of these issues:
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