, Volume 55, Issue 2, pp 219–228 | Cite as

Seasonal incidence of two co-occurring adult parasitoids of Acalymma vittatum in New York State: Centistes (Syrrhizus) diabroticae and Celatoria setosa

  • Rebecca Rice SmythEmail author
  • Michael P. Hoffmann


We report the incidence of striped cucumber beetle (Acalymma vittatum [Fabricius]) (Coleoptera: Chrysomelidae) parasitism in bi-weekly samples from diverse farm locations in central New York State over the course of two growing seasons. Two parasitoid species not previously verified in this geographic region were found: Celatoria setosa (Coquillett) (Diptera: Tachinidae) and Centistes (Syrrhizus) diabroticae (Gahan) (Hymenoptera: Braconidae). Parasitism by C. setosa, up to 43%, [mean 8.67%] was comparable to previously published rates. Contrary to the expectations of earlier authors, however, C. diabroticae was found to be ubiquitous and maximum rates of parasitism (~54%) were >threefold greater than the only other published report for this species [C. diabroticae mean 14.36%]. In laboratory assays, we investigated C. diabroticae larval development. We also tested the effects of wasp clone and host beetle sex on C. diabroticae larval development. This is the first documentation of life cycle information for this braconid.


Acalymma vittatum (Coleoptera: Chrysomelidae) Celatoria setosa (Diptera: Tachinidae) Centistes (Syrrhizus) diabroticae (Hymenoptera: Braconidae) Larval competition Host/parasitoid phenology 



This work would not have been possible without the farmers who generously participated in this study, nor without many faithful hours of beetle collection and dissection by Liana Beth Maller [now Morishita],William Albano, and Richard Coogan. We sincerely thank John Sanderson for instrumental insight and Kelley Jean Tilmon for sharing her expertise in handling braconids; Michael J. McDonald for determination of C. diabroticae, E. Richard Hoebeke for confirmation of C. setosa, and Françoise Vermeylen for statistical advice. This work was supported in part by a grant from United States Department of Agriculture, Cooperative State Research, Education, and Extension Service (CSREES), Integrated Pest Management Program, Northeastern Region.


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Copyright information

© International Organization for Biological Control (IOBC) 2009

Authors and Affiliations

  1. 1.Department of EntomologyCornell UniversityIthacaUSA
  2. 2.Department of EntomologyCornell UniversityIthacaUSA

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