Journal
BIOCONTROL
Volume 55, Issue 2, Pages 219-228Publisher
SPRINGER
DOI: 10.1007/s10526-009-9232-y
Keywords
Acalymma vittatum (Coleoptera: Chrysomelidae); Celatoria setosa (Diptera: Tachinidae); Centistes (Syrrhizus) diabroticae (Hymenoptera: Braconidae); Larval competition; Host/parasitoid phenology
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Funding
- United States Department of Agriculture, Cooperative State Research, Education, and Extension Service (CSREES), Northeastern Region
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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 (similar to 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.
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