Fungus gnats

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How do I recognize mourning flies?

Fungus gnats or fungus flies are black in color, 1-3 mm in size and fly quite slowly. Many people think they resemble small black flies or fruit flies.

doorzichtige, wormachtige larven van rouwvliegjes die plantenwortels opeten

Mourning flies larvae

The adult mourning flies lay eggs in the soil of your plants, from which larvae hatch. These larvae are transparent in color and resemble small worms.

doorzichtige larve rouwvlieg zonder pootjes in aarde

How do I recognize fungus fly damage?

The adult mourning flies do not cause direct damage to your plants. The mourning flies lay eggs in the soil from which larvae hatch. The larvae can cause damage to the plants. The larvae of fungus flies live in the soil and prefer a moist and nutrient-rich environment. They mainly eat rotting plant material and the fungi that grow on it. Some types of larvae also gnaw the roots of young plants. The larvae cannot move far and therefore damage is always local.

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How do I combat fungus gnats?

Mourning flies can be controlled all year round, as soon as you see the mourning flies. To break the complete life cycle, you can use Felti nematodes and Sticky Leaf trapping cards. Felti nematodes are tiny worms that attack the larvae in the soil. You can catch the adult mourning flies with the Sticky Leaf catching cards.

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Preventing fungus flies

The larvae of fungus flies like a moist soil with rotting roots. Therefore, try to keep the soil as dry as possible. Plants need water less often, especially in winter. Check the roots of the plants occasionally by lifting the inner pot or place a moisture meter to check whether the plant roots are not too wet.

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