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BioControl

, Volume 60, Issue 3, pp 293–306 | Cite as

Long-term storage of eggs of Leptoglossus occidentalis for the mass-rearing of its parasitoid Gryon pennsylvanicum

  • Giuseppino Sabbatini PeverieriEmail author
  • Paola Furlan
  • Daniele Benassai
  • Ward B. Strong
  • Pio Federico Roversi
Article

Abstract

Leptoglossus occidentalis Heidemann (Heteroptera, Coreidae) is a harmful insect to cones and seeds of several conifers in North America, and was accidentally introduced into Europe where it rapidly spread to many countries. In Central Italy, the pest damaged cones and seeds of Pinus pinea L., leading to a severe reduction of pine nut production. Gryon pennsylvanicum (Ashmead) (Hymenoptera, Platygastridae) is the most common egg-parasitoid of L. occidentalis in British Columbia. This natural enemy has been successfully reared under laboratory conditions. However, the possibility to arrange a sufficient large number of specimens is crucial for the success in biological control. In the present work, stored L. occidentalis eggs at fridge and freezing temperatures of +4, −20 °C, and ultra-low temperatures of −80 and −140 °C for different times up to one year, were tested for parasitization success. Results showed that G. pensylvanicum can exploit successfully host eggs stored for long time when stored at ultra-low temperatures and that storage did not affect fitness of the first and second generation. For shorter periods of time, the use of +4 °C for store eggs did not vary significantly from eggs stored at ultra-low temperatures.

Keywords

Western Conifer Seed Bug Classical biological control Cold storage Egg parasitoid 

Notes

Acknowledgments

This work was supported by the Italian Ministry of Agricultural, Food and Forestry National Project “PINITALY—the restart of the Pine Nuts production in Italy by new pest control strategies”, DM 256/7303/2007.

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Copyright information

© International Organization for Biological Control (IOBC) 2014

Authors and Affiliations

  • Giuseppino Sabbatini Peverieri
    • 1
    Email author
  • Paola Furlan
    • 1
  • Daniele Benassai
    • 1
  • Ward B. Strong
    • 2
  • Pio Federico Roversi
    • 1
  1. 1.Consiglio per la Ricerca e la sperimentazione in AgricolturaCentro di Ricerca per l’Agrobiologia e la PedologiaFlorenceItaly
  2. 2.Kalamalka Forestry CentreBritish Columbia Ministry of Forests, Lands and Natural Resource OperationsVernonCanada

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