Is this study published anywhere?
Here is the only thing that I could find. She will have to repeat the study to verify the results.
See the last sentence.
Diana Sammataro, co-author of the Beekeeper’s Handbook (4th ed. 2011), began keeping bees in 1972 in Litchfield, CT, setting up a colony in her maternal grandfather’s old bee hive equipment. From then on, she decided that her B.S. in Landscape Architecture (Un. of Michigan, Ann Arbor), would not be a career, but that honey bees would. After a year of independent studies on floral pollination (Michigan State Un. Bee Lab, East Lansing), she earned an M.S. in Urban Forestry (Un. Michigan, Ann Arbor). In 1978 she joined Peace Corps and taught beekeeping in the Philippines for 3 years. On returning, she worked at the USDA Bee Lab in Madison, WI under Dr. Eric Erickson, studying the effects of plant breeding and flower attraction of bees in sunflower lines. When the lab closed, she eventually went to work at the A.I. Root Company as Bee Supply Sales Manager in Medina OH. In 1991 she was accepted at the Rothenbuhler Honey Bee Lab at The Ohio State University (Columbus, OH) to study for a Ph.D. under Drs. Brian Smith and Glen Needham. In 1995, she worked as a post-doctoral assistant at the Ohio State University Ag. Research Center in Wooster OH, with Dr. James Tew and in 1998 at the Penn State University Bee lab, (State College, PA) with Maryann Frazier and Dr. Nancy Ostiguy. Early in 2002, she was invited to join the USDA-ARS Carl Hayden Honey Bee Research Center in Tucson AZ. Her current position is a Research Entomologist with Dr. G. DeGrandi-Hoffman and staff. Her current work at the lab includes research on bee nutrition problems, Varroa, proteomics of bees and mites, and pollination problems.