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Gregariousness in lepidopteran larvae.

Chenyu Qian1, Chao Wen2, Xiaoli Guo3

  • 1College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.

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This summary is machine-generated.

Lepidopteran larvae exhibit diverse group behaviors, evolving multiple times across families. This gregariousness enhances survival and development but faces challenges like competition and disease transmission.

Keywords:
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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Entomology

Background:

  • Larval aggregation is a widespread phenomenon in Lepidoptera, observed across 23 families.
  • This behavior suggests multiple independent evolutionary origins.
  • Gregariousness in lepidopteran larvae is influenced by ecological and evolutionary pressures.

Purpose of the Study:

  • To review the evolutionary and ecological factors driving larval aggregation in Lepidoptera.
  • To understand the benefits and costs associated with gregarious behavior in these insects.
  • To explore the mechanisms maintaining group cohesion and the implications for pest management.

Main Methods:

  • Literature review of published studies on lepidopteran larval aggregation.
  • Analysis of evolutionary patterns, including kin and group selection hypotheses.
  • Examination of factors influencing group dynamics, such as aggregation cues and environmental variables.

Main Results:

  • Larval aggregation in Lepidoptera has evolved independently multiple times.
  • Gregariousness is linked to increased survivorship and faster development, especially in early instars.
  • Costs include intensified intraspecific competition and increased susceptibility to pathogen/pesticide transmission.

Conclusions:

  • The evolution of gregariousness in lepidopteran larvae represents a balance between benefits (e.g., defense, thermoregulation) and costs (e.g., competition, disease).
  • Group cohesion is facilitated by chemical cues (pheromones) and physical interactions.
  • Understanding these dynamics is crucial for developing integrated pest management strategies against gregarious lepidopteran pests.