Utah State University Extension
This fact sheet describes Syrphid flies, a diverse family of insects which can provide both biocontrol and pollination services. While not available for purchase, natural populations can be conserved through wise insecticide use practices and enhancing floral resources. Beneficial insects, including syrphid flies, are a useful tool for home gardeners and commercial agriculturalists alike to keep damaging pest populations to a minimum.
Price, Steven and Patterson, Ron, "Beneficial Predators: Syrphid Flies" (2018). All Current Publications. Paper 1950.