Long-legged flies
The Dolichopodidae family, commonly known as long-legged flies, belongs to the order Diptera. These flies are easily recognized by their slender bodies and metallic or green coloration. While they are primarily recognized as beneficial predators, certain species can cause economic damage to crops due to their larval feeding habits in the soil.
What the section contains
Aphrosylus
Aphrosylus
Aphrosylus raptor
Aphrosylus raptor
Argyra
Argyra
Argyra diaphana
Argyra diaphana
Campsicnemus
Campsicnemus
Dolichopus
Dolichopus
Green shore fly
Hydrophorus oceanus
Hydrophorus
Hydrophorus
Long-legged fly
Dolichopus popularis
Long-legged fly
Poecilobothrus
Long-legged fly
Campsicnemus scambus
Medeterus
Medeterus
Medeterus flavipes
Medeterus flavipes
Poecilobothrus nobilitatus
Poecilobothrus nobilitatus
Sciapus
Sciapus
Sciapus platypterus
Sciapus platypterus
Syntormon
Syntormon
Syntormon pallipes
Syntormon pallipes
Xiphandrium
Xiphandrium
Xiphandrium appendiculatum
Xiphandrium appendiculatum
Long-legged flies
The larvae of these insects develop in moist soil environments, which are rich in organic matter. In intensive agricultural systems, they may feed on young plant roots and germinating seeds, particularly during periods of high humidity or following heavy rainfall when soil moisture supports their rapid population growth.
Their life cycle consists of four stages: egg, larva, pupa, and adult. Eggs are typically laid in soil or moss. Upon hatching, the larvae penetrate the substrate. Depending on the species and environmental conditions, the development from larva to adult can take several weeks, allowing for multiple generations per season in favorable climates.
The economic impact on crops is primarily observed in early-stage vegetation. By damaging the root system and seeds, long-legged fly larvae contribute to reduced plant vigor, stunting, and overall yield loss. Severe infestations can result in significant gaps in field density, necessitating potential reseeding.
Effective management and control measures include:
- Implementing crop rotation to disrupt the life cycle of the pest.
- Ensuring proper soil drainage to limit favorable larval habitats.
- Utilizing systemic insecticide seed treatments for early root protection.
- Conducting mechanical soil cultivation to expose larvae to natural enemies.
- Monitoring adult population levels using yellow sticky traps during the peak flight season.