Eur. J. Entomol. 105 (2): 241-248, 2008 | 10.14411/eje.2008.034

Testing the impact of laboratory reared indigenous leafroller (Lepidoptera: Tortricidae) parasitoids (Hymenoptera: Ichneumonidae, Braconidae) on sentinel hosts in controlled orchard releases

Joan E. COSSENTINE
Agriculture and Agri-Food Canada, 4200 Highway 97, Box 5000, Pacific Agri-Food Research Centre, Summerland, BC,

Leafrollers can experience high levels of indigenous parasitism in organically managed apple orchards and the augmentative release of specific parasitoid species to suppress these secondary pests may be advantageous in orchards converting to non-chemical pest management. Caged and uncaged releases of two ichneumonid [Apophua simplicipes (Cresson) and Glypta variegata Dasch] and two braconid (Macrocentrus linearis Nees and Apanteles polychrosidis Viereck) koinobiont endoparasitoids of the obliquebanded leafroller, Choristoneura rosaceana (Lepidoptera: Tortricidae) on host-infested potted apple trees were conducted to assess the parasitoids' abilities to find and successfully parasitize sentinel hosts under orchard conditions. Seasonal timing of the trials varied for each parasitoid species, based on their relative performance under simulated summer/fall conditions in laboratory trials. After the release of five or fifty parasitoid females, the mean percent parasitism of leafroller larvae collected from infested trees ranged from 0 to 75% depending on the parasitoid species involved. Although caged releases tended to increase the percentage of live parasitized hosts in release treatments, uncaged releases provided a more realistic assessment of the parasitoid's ability to seek and find hosts within an infested area over a longer period. Release of the large, solitary A. simplicipes, had the most significant impact on the host population density.

Keywords: Braconidae, Apanteles polychrosidis, Macrocentrus linearis, Ichneumonidae, Apophua simplicipes, Glypta variegata, Tortricidae, Choristoneura rosaceana, orchard release, parasitoid

Accepted: January 3, 2008; Published: May 15, 2008


References

  1. BEZEMER T.M. & MILLS N.J. 2001: Host density responses of Mastrus ridibundus, a parasitoid of the codling moth, Cydia pomonella. Biol. Control 22: 169-175 Go to original source...
  2. CARRIERE Y. 1992: Host plant exploitation within a population of a generalist herbivore, Choristoneura rosaceana. Entomol. Exp. Appl. 65: 1-10 Go to original source...
  3. CASTILLO J., JACA J.A., PENA J.E., ULMER B.J. & HALL D.G. 2006: Effect of temperature on the life history of Quadrastichus haitensis (Hymenoptera: Eulophidae), an endoparasitoid of Diaprepes abbreviatus (Coleoptera: Curculionidae). Biol. Control 36: 189-196 Go to original source...
  4. CHAPMAN P.J., LIENK S.E. & DEAN R.W. 1968: Bionomics of Choristoneura rosaceana. Ann. Entomol. Soc. Am. 61: 285-290
  5. COSSENTINE J., JENSEN L., DEGLOW E., BENNETT A., GOULET H., HUBER J. & O'HARA J. 2004a: The parasitoid complex affecting Choristoneura rosaceana and Pandemis limitata populations in organically managed apple orchards. Biocontrol Sci. Technol. 49: 359-372 Go to original source...
  6. COSSENTINE J.E., DEGLOW E.K., JENSEN L.B.M. & BENNETT A.M.R. 2004b: A biological assessment of Apophua simplicipes (Hymenoptera: Ichneumonidae) as a parasitoid of the obliquebanded leafroller, Choristoneura rosaceana (Lepidoptera: Tortricidae). Biocontrol Sci. Technol. 14: 691-699 Go to original source...
  7. COSSENTINE J.E. DEGLOW E.K., JENSEN L.B.M. & GOULET H. 2005: Biological assessment of Macrocentrus linearis Nees and Apanteles polychrosidis Viereck (Hymenoptera: Braconidae) as parasitoids of the obliquebanded leafroller, Choristoneura roscaceana (Lepidoptera: Tortricidae). Biocontrol Sci. Technol. 15: 711-720 Go to original source...
  8. COSSENTINE J.E., DEGLOW E.K., JENSEN L.B.M. & BENNETT A.M.R. 2007: A biological assessment of Glypta variegata (Hymenoptera: Ichneumonidae) as a parasitoid of Choristoneura rosaceana (Lepidoptera: Tortricidae). Biocontrol Sci. Technol. 17: 325-329 Go to original source...
  9. DYCK V.A. & GARDINER M.G.T. 1992: Sterile-insect release programme to control the codling moth Cydia pomonella (L.) (Lepidoptera: Olethreutidae) in British Columbia, Canada. Acta Phytopathol. Entomol. Hungar. 27: 219-228
  10. FOERSTER L.A. & BUTNARIU A.R. 2004: Development, reproduction and longevity of Telenomus cyamophylaxi egg parasitoid of the velvetbean caterpillar Anticarsia gemmatalis, in relation to temperatures. Biol. Control 29: 1-4 Go to original source...
  11. HOUGARDY E. & MILLS N.J. 2006: The influence of host deprivation and egg expenditure on the rate of dispersal of a parasitoid following field release. Biol. Control 37: 206-213 Go to original source...
  12. LEWIS W.J. & MARTIN JR. W.R. 1990: Semiochemicals for use with parasitoids: Status and future. J. Chem. Ecol. 16: 3067-3089 Go to original source...
  13. MADSEN H.F. & PROCTER P.J. 1982: Insects and Mites of Tree Fruits in British Columbia. Ministry of Agriculture and Food, Victoria, BC, 70 pp
  14. NOLDUS L.P.J.J. 1989: Semiochemicals, foraging behaviour and quality of entomophagous insects for biological control. J. Appl. Entomol. 108: 425-451 Go to original source...
  15. SAS 2000: SAS Version 8.1. SAS Institute, Cary, NC. SHOREY H.H. & HALE R.L. 1965: Mass-rearing of the larvae of nine noctuid species on a simple artificial medium. J. Econ. Entomol. 58: 522-524
  16. SUCKLING D.M., BURNIP G.M., GIBB A.R., DALY J.M. & ARMSTRONG K.F. 2001: Plant and host effects on the leafroller parasitoid Dolichogenidia tasmanica. Entomol. Exp. Appl. 100: 253-260 Go to original source...
  17. VAN DRIESCHE R.G. & BELLOWS T.S. JR. 1996: Biological Control. Chapman & Hall, New York, 539 pp
  18. VAN LENTEREN J.C. & WOETS J. 1988: Biological and integrated control in greenhouses. Annu. Rev. Entomol. 33: 239-269 Go to original source...
  19. VET L.E. 2001: Parasitoid searching efficiency links behaviour to population processes. Appl. Entomol. Zool. 36: 399-408 Go to original source...
  20. WAAGE J.K. 1983: Aggregation in field parasitoid populations: foraging time allocation by a population of Diadegma (Hymenoptera: Ichneumonidae). Ecol. Entomol. 8: 447-453. Go to original source...