Apidologie

, Volume 43, Issue 6, pp 624–633 | Cite as

Nesting biology of the leafcutting bee Megachile (Pseudocentron) gomphrenoides (Hymenoptera: Megachilidae) in an agro-ecosystem

  • Juan Pablo Torretta
  • Silvana Patricia Durante
  • María Guadalupe Colombo
  • Alicia Mabel Basilio
Original article

Abstract

The nesting biology of the leafcutting bee Megachile (Pseudocentron) gomphrenoides Vachal (Hymenoptera: Megachilidae) was studied in an agro-ecosystem in the Province of Buenos Aires, Argentina. Data were obtained from trap-nests placed in the field margin during two agricultural years (2008/2009 and 2009/2010). Females made an average of 7.55 cells per nest, and used leaves of at least three plant species to build their nests. Provisions of cells were principally of Asteraceae pollen. Adult emergence showed a bimodal pattern suggesting a facultative bivoltinism life cycle. Approximately, 30 % of all offspring failed to complete development to the adult stage and an additional 10 % were killed by natural enemies. These included parasitic wasps (Eulophidae: Melittobia and Horismenus), a cleptoparasite bee (Megachilidae: Coelioxys), and a bristle beetle (Meloidae: Tetraonyx). The host/cleptoparasite association between M. gomphrenoides and Coelioxys remissa constitutes the first such record for both species, and the MegachileTetraonyx interaction was previously unknown. M. gomphrenoides possesses some characteristics that make it an interesting potential opportunity to use this species for pollination of commercial sunflowers in the Pampean region.

Keywords

solitary bees trap-nest pollination Argentina 

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Copyright information

© INRA, DIB and Springer-Verlag, France 2012

Authors and Affiliations

  • Juan Pablo Torretta
    • 1
    • 4
  • Silvana Patricia Durante
    • 2
  • María Guadalupe Colombo
    • 2
  • Alicia Mabel Basilio
    • 3
  1. 1.Facultad de AgronomíaCátedra de Botánica AgrícolaBuenos AiresArgentina
  2. 2.División EntomologíaMuseo de La PlataLa PlataArgentina
  3. 3.Cunicultura y Apicultura, Facultad de AgronomíaCátedra de AviculturaBuenos AiresArgentina
  4. 4.Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina

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