|A sciarid fly (Sciara hemerobioides)|
| Dark-winged fungus gnats
The Sciarid fly refers to any fly of the Sciaridae family. Commonly found in moist environments, they are known to be a pest of mushroom farms and are commonly found in household plant pots. More than 600 species are known from Europe.
Young seedlings and cuttings are very susceptible to damage by the larvae, which weaken growth and can cause plant death. Sciarid larvae can tunnel up the stems of young cuttings. Plants with well-established roots are less susceptible to damage, but heavy infestations can cause plant wilting and death. Larvae can also feed on the lower leaves resting on the compost and this damage can be confused with that made by slugs.
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