Known as Fungus Gnats, Mushroom Fly.
They feed on mycelium
in the soil and are generally of no importance. However they
occasionally attack garden plants.
black flies up to 3-4mm long. They
are attracted to potting composts and are often seen in greenhouses.
Adults are attracted to potting media especially if the organic
content is high, like peat as an example. Females lay 100 eggs each
which hatch in 1 week. Larvae
feed for about a month.
sciarids affect plants so treatment is only necessary if damage to