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Jan. 06, 2012
Parasitic Fly Threatens Honey Bee Populations
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| Honey bee colonies around the United States are in decline, threatened by several different diseases and parasites. John Hafernik, a professor of biology at San Francisco State University, describes how a parasitic fly that was thought to prey upon bumblebees may pose a new threat to honey bee populations in the U.S. |
Produced by Charles Bergquist, Director and Contributing Producer
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John Hafernik
Professor of Biology
San Francisco State University
San Francisco, California



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