Tuesday, 19 November 2002
D0369

This presentation is part of : Display Presentations, Subsection Ce. Insect Pathology and Microbial Control

Development of a bioassay system for testing the effects of microbial control agents on fungus gnats, Bradysia sp. (Diptera: Sciaridae)

Emily Jane Sensenbach1, Stephen P. Wraight2, and John P. Sanderson1. (1) Cornell University, Department of Entomology, USDA-ARS Federal Plant Soil and Nutrition Laboratory, Tower Road, Ithaca, NY, (2) USDA-ARS, U.S. Plant, Soil, and Nutrition Laboratory, Tower Road, Ithaca, NY

Dark-winged fungus gnats (Diptera: Sciaridae) are a common pest of greenhouse ornamental crops, damaging roots directly, by larval phytophagy, or indirectly, by vectoring phytopathogens. A bioassay system was developed to determine the effects of microbial control agents on survivorship of larvae and pupae in soil. Known numbers of larvae were transferred into insect-tight containers supporting plants and peat-based potting medium. The effects of entomopathogenic fungi and plant-pathogen suppressive fungi on fungus gnat survivorship to adulthood were assessed. Implications for biological control programs are discussed.

Species 1: Diptera Sciaridae Bradysia (fungus gnat)
Keywords: entomopathogen, phytopathogen

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