Why does your Red Onion Linus F1 have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The larvae of fungus gnats live in the organic matter of the soil and feed on fine root hairs. In onion crops, they can cause stunted growth or bulb rot by damaging the delicate root system of the Linus F1 variety.
The larvae of this fly species burrow into the onion bulb, feeding on the fleshy scales. This creates internal damage that can lead to secondary rot and attracts other small flies to the decaying tissue.
Excessive moisture and decomposing organic matter in the onion bed create a perfect breeding ground for various small dipterans. This environment often leads to secondary fungal infections in the Linus F1 bulbs.
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