Shore Fly
Algae-associated fly leaving black spotting on leaves and growing surfaces.
Shore flies (Scatella spp.) breed in algae-rich, wet substrates around benches, paths and capillary matting. Larvae feed on algae and decaying material, while adults create black droppings on foliage and structures. They are mainly a nuisance and contamination issue but can spread pathogens. Biological control options include Dalotia coriaria (Atheta) and entomopathogenic nematodes such as Steinernema feltiae, alongside cultural controls to reduce algae and standing water.
Biological Controls for Shore Fly
The options below are examples of beneficial insects and biological products commonly used against shore fly. Always refer to supplier guidance and product labels for crop safety and local registration status.
Stratiolaelaps scimitus
Product: Hypoline
Environment: glasshouse
Temperature Range: 10.0 – 28.0°C
Rate: 50–100 mites/m²
Frequency: One main introduction with top-ups as needed
Helps suppress shore fly larvae; integrate with algae control and drainage improvements.
Atheta coriaria
Product: Staphyline
Environment: all
Temperature Range: 10.0 – 30.0°C
Rate: 10–50/m²
Frequency: introduce early; top up as needed
Support predator layer in wet/algae-prone areas. Combine with sanitation and drying-down where possible.
Steinernema feltiae
Product: Exhibitline Sf
Environment: all
Temperature Range: 10.0 – 30.0°C
Rate: 0.5–1 million/m² (via drench)
Frequency: repeat at 7–14 day intervals as needed
Targets larval stages in wet substrate areas. Combine with sanitation, algae control and predator layer (Stratiolaelaps / Atheta).
Related Biological Solutions
Growers dealing with shore fly often also monitor these pests as part of a complete IPM programme: