Sciarid Fly Larvae
Scientific group or name: Bradysia species
Overview
Sciarid larvae live in damp growing media and feed mainly on fungi and decaying matter, but high populations can damage fine roots and soft stems.
Host plants
Seedlings, cuttings, young roots and moist organic growing media.
Identification
Larvae are translucent-white, legless and have a distinct shiny black head capsule.
Damage and symptoms
Root grazing reduces establishment and may allow pathogens into wounds. Young seedlings and cuttings are most vulnerable.
Lifecycle and favourable conditions
Wet compost, algae, organic residues and continuously moist propagation areas favour breeding.
Monitoring
Use potato slices or similar media-surface baits to inspect larvae and yellow traps to track adults.
Management
Correct excess moisture, clean algae and residues, improve drainage and manage the full breeding area rather than individual pots alone.
Biological control and natural enemies
Steinernema feltiae, Stratiolaelaps scimitus and Atheta coriaria are commonly used within integrated programmes.
Biological control should be selected only after the pest has been identified and the crop, temperature, growing environment and pest pressure have been considered.
Related BioWiki pages
Sciarid Fly · Steinernema feltiae
This page provides general integrated pest-management information. Identification and control decisions should be confirmed for the crop and local situation.